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<span class="vector-toc-numb">1</span> <span>Voorbeeld</span> </div> </a> <ul id="toc-Voorbeeld-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Overbodigheid_van_ppm" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Overbodigheid_van_ppm"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Overbodigheid van ppm</span> </div> </a> <ul id="toc-Overbodigheid_van_ppm-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Broeikasgassen_en_ppmv" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Broeikasgassen_en_ppmv"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Broeikasgassen en ppmv</span> </div> </a> <ul id="toc-Broeikasgassen_en_ppmv-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Andere_gerelateerde_eenheden" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Andere_gerelateerde_eenheden"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Andere gerelateerde eenheden</span> </div> </a> <ul id="toc-Andere_gerelateerde_eenheden-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Inhoud" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Inhoudsopgave omschakelen" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button 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Beschikbaar in 40 talen" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-40" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">40 talen</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AC%D8%B2%D8%A1_%D9%81%D9%8A_%D8%A7%D9%84%D9%85%D9%84%D9%8A%D9%88%D9%86" title="جزء في المليون – Arabisch" lang="ar" hreflang="ar" data-title="جزء في المليون" data-language-autonym="العربية" data-language-local-name="Arabisch" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Partes_per_mill%C3%B3n" title="Partes per millón – Asturisch" lang="ast" hreflang="ast" data-title="Partes per millón" data-language-autonym="Asturianu" data-language-local-name="Asturisch" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Parts_per_million" title="Parts per million – Bosnisch" lang="bs" hreflang="bs" data-title="Parts per million" data-language-autonym="Bosanski" data-language-local-name="Bosnisch" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Part_per_mili%C3%B3" title="Part per milió – Catalaans" lang="ca" hreflang="ca" data-title="Part per milió" data-language-autonym="Català" data-language-local-name="Catalaans" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Parts_per_million" title="Parts per million – Tsjechisch" lang="cs" hreflang="cs" data-title="Parts per million" data-language-autonym="Čeština" data-language-local-name="Tsjechisch" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Parts_per_million" title="Parts per million – Deens" lang="da" hreflang="da" data-title="Parts per million" data-language-autonym="Dansk" data-language-local-name="Deens" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Parts_per_million" title="Parts per million – Duits" lang="de" hreflang="de" data-title="Parts per million" data-language-autonym="Deutsch" data-language-local-name="Duits" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/Parts_per_(%CF%80%CE%BF%CF%83%CE%BF%CF%83%CF%84%CE%B9%CE%B1%CE%AF%CE%B1_%CE%BC%CE%BF%CE%BD%CE%AC%CE%B4%CE%B1)" title="Parts per (ποσοστιαία μονάδα) – Grieks" lang="el" hreflang="el" data-title="Parts per (ποσοστιαία μονάδα)" data-language-autonym="Ελληνικά" data-language-local-name="Grieks" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en badge-Q70893996 mw-list-item" title=""><a href="https://en.wikipedia.org/wiki/Parts_per_million" title="Parts per million – Engels" lang="en" hreflang="en" data-title="Parts per million" data-language-autonym="English" data-language-local-name="Engels" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Partes_por_mill%C3%B3n" title="Partes por millón – Spaans" lang="es" hreflang="es" data-title="Partes por millón" data-language-autonym="Español" data-language-local-name="Spaans" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Miljondikosa" title="Miljondikosa – Estisch" lang="et" hreflang="et" data-title="Miljondikosa" data-language-autonym="Eesti" data-language-local-name="Estisch" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Milioiko_parte" title="Milioiko parte – Baskisch" lang="eu" hreflang="eu" data-title="Milioiko parte" data-language-autonym="Euskara" data-language-local-name="Baskisch" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Ppm" title="Ppm – Fins" lang="fi" hreflang="fi" data-title="Ppm" data-language-autonym="Suomi" data-language-local-name="Fins" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Partie_par_million" title="Partie par million – Frans" lang="fr" hreflang="fr" data-title="Partie par million" data-language-autonym="Français" data-language-local-name="Frans" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-frr mw-list-item"><a href="https://frr.wikipedia.org/wiki/Ppm" title="Ppm – Noord-Fries" lang="frr" hreflang="frr" data-title="Ppm" data-language-autonym="Nordfriisk" data-language-local-name="Noord-Fries" class="interlanguage-link-target"><span>Nordfriisk</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Partes_por_mill%C3%B3n" title="Partes por millón – Galicisch" lang="gl" hreflang="gl" data-title="Partes por millón" data-language-autonym="Galego" data-language-local-name="Galicisch" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Parti_per_milione" title="Parti per milione – Italiaans" lang="it" hreflang="it" data-title="Parti per milione" data-language-autonym="Italiano" data-language-local-name="Italiaans" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/Ppm" title="Ppm – Japans" lang="ja" hreflang="ja" data-title="Ppm" data-language-autonym="日本語" data-language-local-name="Japans" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/Ppm" title="Ppm – Koreaans" lang="ko" hreflang="ko" data-title="Ppm" data-language-autonym="한국어" data-language-local-name="Koreaans" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-li mw-list-item"><a href="https://li.wikipedia.org/wiki/Ppm" title="Ppm – Limburgs" lang="li" hreflang="li" data-title="Ppm" data-language-autonym="Limburgs" data-language-local-name="Limburgs" class="interlanguage-link-target"><span>Limburgs</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Ppm" title="Ppm – Litouws" lang="lt" hreflang="lt" data-title="Ppm" data-language-autonym="Lietuvių" data-language-local-name="Litouws" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/Parts_per_million" title="Parts per million – Nedersaksisch" lang="nds" hreflang="nds" data-title="Parts per million" data-language-autonym="Plattdüütsch" data-language-local-name="Nedersaksisch" class="interlanguage-link-target"><span>Plattdüütsch</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Parts_per_million" title="Parts per million – Noors - Nynorsk" lang="nn" hreflang="nn" data-title="Parts per million" data-language-autonym="Norsk nynorsk" data-language-local-name="Noors - Nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Andeler_per_million" title="Andeler per million – Noors - Bokmål" lang="nb" hreflang="nb" data-title="Andeler per million" data-language-autonym="Norsk bokmål" data-language-local-name="Noors - Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Parte_por_milh%C3%A3o" title="Parte por milhão – Portugees" lang="pt" hreflang="pt" data-title="Parte por milhão" data-language-autonym="Português" data-language-local-name="Portugees" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Ppm" title="Ppm – Roemeens" lang="ro" hreflang="ro" data-title="Ppm" data-language-autonym="Română" data-language-local-name="Roemeens" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9C%D0%B8%D0%BB%D0%BB%D0%B8%D0%BE%D0%BD%D0%BD%D0%B0%D1%8F_%D0%B4%D0%BE%D0%BB%D1%8F" title="Миллионная доля – Russisch" lang="ru" hreflang="ru" data-title="Миллионная доля" data-language-autonym="Русский" data-language-local-name="Russisch" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Ppm" title="Ppm – Servo-Kroatisch" lang="sh" hreflang="sh" data-title="Ppm" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="Servo-Kroatisch" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Parts_per_million" title="Parts per million – Simple English" lang="en-simple" hreflang="en-simple" data-title="Parts per million" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Parts_per_million" title="Parts per million – Slowaaks" lang="sk" hreflang="sk" data-title="Parts per million" data-language-autonym="Slovenčina" data-language-local-name="Slowaaks" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/%C5%A0tevilo_delcev_na_milijon" title="Število delcev na milijon – Sloveens" lang="sl" hreflang="sl" data-title="Število delcev na milijon" data-language-autonym="Slovenščina" data-language-local-name="Sloveens" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/Ppm" title="Ppm – Servisch" lang="sr" hreflang="sr" data-title="Ppm" data-language-autonym="Српски / srpski" data-language-local-name="Servisch" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Parts_per_million" title="Parts per million – Zweeds" lang="sv" hreflang="sv" data-title="Parts per million" data-language-autonym="Svenska" data-language-local-name="Zweeds" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Parts_per_million" title="Parts per million – Swahili" lang="sw" hreflang="sw" data-title="Parts per million" data-language-autonym="Kiswahili" data-language-local-name="Swahili" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Ppm" title="Ppm – Turks" lang="tr" hreflang="tr" data-title="Ppm" data-language-autonym="Türkçe" data-language-local-name="Turks" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%9C%D1%96%D0%BB%D1%8C%D0%B9%D0%BE%D0%BD%D0%BD%D0%B0_%D1%87%D0%B0%D1%81%D1%82%D0%BA%D0%B0" title="Мільйонна частка – Oekraïens" lang="uk" hreflang="uk" data-title="Мільйонна частка" data-language-autonym="Українська" data-language-local-name="Oekraïens" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vi badge-Q70893996 mw-list-item" title=""><a href="https://vi.wikipedia.org/wiki/Ppm_(m%E1%BA%ADt_%C4%91%E1%BB%99)" title="Ppm (mật độ) – Vietnamees" lang="vi" hreflang="vi" data-title="Ppm (mật độ)" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamees" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E7%99%BE%E8%90%AC%E5%88%86%E6%AF%94" title="百萬分比 – Chinees" lang="zh" hreflang="zh" data-title="百萬分比" data-language-autonym="中文" data-language-local-name="Chinees" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Ppm" title="Ppm – Minnanyu" lang="nan" hreflang="nan" data-title="Ppm" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="Minnanyu" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E7%99%BE%E8%90%AC%E5%88%86%E6%AF%94" title="百萬分比 – Kantonees" lang="yue" hreflang="yue" data-title="百萬分比" data-language-autonym="粵語" data-language-local-name="Kantonees" class="interlanguage-link-target"><span>粵語</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q21006887#sitelinks-wikipedia" title="Taalkoppelingen bewerken" class="wbc-editpage">Koppelingen bewerken</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Naamruimten"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Parts_per_million" title="Inhoudspagina bekijken [c]" accesskey="c"><span>Artikel</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Overleg:Parts_per_million" rel="discussion" title="Overleg over deze pagina [t]" accesskey="t"><span>Overleg</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Taalvariant wijzigen" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span 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title="Broncode van deze pagina bewerken [e]" accesskey="e"><span>Brontekst bewerken</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Parts_per_million&action=history" title="Eerdere versies van deze pagina [h]" accesskey="h"><span>Geschiedenis weergeven</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Paginahulpmiddelen"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Hulpmiddelen" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Hulpmiddelen</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Hulpmiddelen</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">naar zijbalk verplaatsen</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">verbergen</button> </div> <div 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Een concentratie van 1 ppm geeft aan dat er één deel van een product is op een totaal van een miljoen delen, meestal uitgedrukt in massa. Eén ppm is duizend keer zo klein als één promille. </p><p>De dimensieloze eenheid ppm wordt vooral veel gebruikt om lage concentraties aan te duiden in de <a href="/wiki/Scheikunde" title="Scheikunde">scheikunde</a> en dan in het bijzonder binnen de <a href="/wiki/Toxicologie" title="Toxicologie">toxicologie</a> en de <a href="/wiki/Milieuwetenschappen" title="Milieuwetenschappen">milieuwetenschappen</a>. <a href="/wiki/MAC-waarde" title="MAC-waarde">Maximaal aanvaarde concentraties</a> van verontreinigingen worden vaak in ppm uitgedrukt of in eenheden die nog kleiner zijn, zoals ppb (<i><a href="/wiki/Parts_per_billion" title="Parts per billion">parts per billion</a></i>) en ppt (<i><a href="/wiki/Parts_per_trillion" title="Parts per trillion">parts per trillion</a></i>). Hierbij wordt de Amerikaanse korte schaal van grote getallen gebruikt; <i>parts per billion</i> moet dus als "deeltjes per <a href="/wiki/Miljard" title="Miljard">miljard</a>" begrepen worden, <i>parts per trillion</i> als "deeltjes per <a href="/wiki/Biljoen" title="Biljoen">biljoen</a>". </p><p>In een overzichtelijk rijtje: </p> <ul><li>1 procent = 10<sup>−2</sup>; 1 promille = 10<sup>−3</sup>; 1 ppm = 10<sup>−6</sup>; 1 ppb = 10<sup>−9</sup>; 1 ppt = 10<sup>−12</sup></li> <li>1 ppm = 10<sup>−4</sup> procent = 10<sup>−3</sup> promille = 10<sup>3</sup> ppb = 10<sup>6</sup> ppt</li></ul> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Voorbeeld">Voorbeeld</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Parts_per_million&veaction=edit&section=1" title="Bewerk dit kopje: Voorbeeld" class="mw-editsection-visualeditor"><span>bewerken</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Parts_per_million&action=edit&section=1" title="De broncode bewerken van de sectie: Voorbeeld"><span>brontekst bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Voorbeeld: als 1 liter water (ca. 1 kg, 1000 g) met 1 massa-ppm <a href="/wiki/Lood_(element)" title="Lood (element)">lood</a> verontreinigd is, bevat dat water 1 milligram (0,001 g) van het zware metaal. </p><p><a href="/wiki/Koper(II)sulfaat" title="Koper(II)sulfaat">Koper(II)sulfaat</a> wordt opgelost in 632 ml <a href="/wiki/Water" title="Water">water</a>. Er bevinden zich 19,48 mg Cu<sup>2+</sup>-ionen in de oplossing, dus de concentratie in ppm kan als volgt berekend worden: 632 ml water heeft een massa van 632 gram of 0,632 kilogram, aangezien de <a href="/wiki/Massadichtheid" title="Massadichtheid">dichtheid</a> 1 kg/dm³ bedraagt. Met de massa Cu<sup>2+</sup>-ionen (opgeloste stof) in milligram en de massa water (<a href="/wiki/Oplosmiddel" title="Oplosmiddel">oplosmiddel</a>) in kilogram wordt vanzelf de factor 10<sup>6</sup> in aanmerking genomen. De concentratie Cu<sup>2+</sup>-ionen in de oplossing bedraagt dus: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\frac {19,48}{0,632}}=30,823\ {\text{ppm}}\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mrow> <mn>19</mn> <mo>,</mo> <mn>48</mn> </mrow> <mrow> <mn>0</mn> <mo>,</mo> <mn>632</mn> </mrow> </mfrac> </mrow> <mo>=</mo> <mn>30</mn> <mo>,</mo> <mn>823</mn> <mtext> </mtext> <mrow class="MJX-TeXAtom-ORD"> <mtext>ppm</mtext> </mrow> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\frac {19,48}{0,632}}=30,823\ {\text{ppm}}\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/b5d65c3b3662746e3971d8d3ce0c378cd71c415c" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.338ex; width:21.953ex; height:5.843ex;" alt="{\displaystyle {\frac {19,48}{0,632}}=30,823\ {\text{ppm}}\,}"></span></dd></dl> <div class="mw-heading mw-heading2"><h2 id="Overbodigheid_van_ppm">Overbodigheid van ppm</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Parts_per_million&veaction=edit&section=2" title="Bewerk dit kopje: Overbodigheid van ppm" class="mw-editsection-visualeditor"><span>bewerken</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Parts_per_million&action=edit&section=2" title="De broncode bewerken van de sectie: Overbodigheid van ppm"><span>brontekst bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Binnen het <a href="/wiki/SI-stelsel" title="SI-stelsel">SI</a> is het werken met ppm en soortgelijke eenheden overbodig en ongewenst. Het verhoudingsgetal ppm kan gemakkelijker en overzichtelijker worden uitgedrukt met μL/L, μg/g, mg/kg, μm/m of iets dergelijks, waarbij de laatste notaties duidelijk laten zien welke eenheden in het spel zijn. </p> <div class="mw-heading mw-heading2"><h2 id="Broeikasgassen_en_ppmv">Broeikasgassen en ppmv</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Parts_per_million&veaction=edit&section=3" title="Bewerk dit kopje: Broeikasgassen en ppmv" class="mw-editsection-visualeditor"><span>bewerken</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Parts_per_million&action=edit&section=3" title="De broncode bewerken van de sectie: Broeikasgassen en ppmv"><span>brontekst bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Met <b>ppmv</b> wordt bedoeld de <a href="/w/index.php?title=Volumeconcentratie&action=edit&redlink=1" class="new" title="Volumeconcentratie (de pagina bestaat niet)">volumeconcentratie</a> uitgedrukt in "delen per miljoen". Ppmv is een afkorting van het Engelse <i>parts per million by volume</i>, in tegenstelling tot “parts per million <i>mass</i>”.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p>De eenheid wordt bijvoorbeeld gebruikt bij de beschrijving van het <a href="/wiki/Broeikaseffect" title="Broeikaseffect">broeikaseffect</a> en geeft dan aan hoeveel <a href="/wiki/Koolstofdioxide" title="Koolstofdioxide">CO<sub>2</sub></a> opgenomen is in de lucht. In 2005 dacht men dat bij een CO<sub>2</sub> concentratie van 550 ppmv de temperatuursverandering van de atmosfeer beperkt blijft tot 2°C ten opzichte van het pre-industriële tijdperk, eind 19e eeuw, inclusief de <a href="/wiki/Koolstofdioxide-equivalent" title="Koolstofdioxide-equivalent">equivalente concentratie</a> van andere <a href="/wiki/Broeikasgas" title="Broeikasgas">broeikasgassen</a>, maar exclusief de invloed van <a href="/wiki/Aerosol" title="Aerosol">aerosolen</a>. Uit recentere <a href="/wiki/Koolstofdioxide#CO2-metingen" title="Koolstofdioxide">CO<sub>2</sub>-metingen</a> blijkt dat de CO<sub>2</sub>-concentratie sedert 2015 de 400 ppm(v) heeft overschreden. </p> <div class="mw-heading mw-heading2"><h2 id="Andere_gerelateerde_eenheden">Andere gerelateerde eenheden</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Parts_per_million&veaction=edit&section=4" title="Bewerk dit kopje: Andere gerelateerde eenheden" class="mw-editsection-visualeditor"><span>bewerken</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Parts_per_million&action=edit&section=4" title="De broncode bewerken van de sectie: Andere gerelateerde eenheden"><span>brontekst bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Basispunt" title="Basispunt">Basispunt</a> (‱) 1 deel per 10000</li> <li><a href="/wiki/Procentpunt" title="Procentpunt">Procentpunt</a></li></ul> <div class="toccolours appendix" role="presentation" style="font-size:90%; margin:1em 0 -0.5em; clear:both;"> <div><span style="font-weight:bold">Bronnen, noten en/of referenties</span></div> <div class="reflist" style="list-style-type: decimal;"><div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r67679320">.mw-parser-output .taalaanduiding{font-family:sans-serif;font-size:85%;cursor:help;color:var(--color-subtle,#555)}.mw-parser-output .taalaanduiding span{border-bottom:1px dotted var(--color-subtle,#555)}</style><span class="taalaanduiding" title="Taal: Engels">(<span>en</span>) </span><span class="citation" id="CITEREF2012"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20190404140706/https://scied.ucar.edu/carbon-dioxide-400-ppm-diagrams">Carbon Dioxide 400 ppm Atmospheric Concentration Diagrams</a> (2012). Gearchiveerd op <span class="mw-formatted-date" title="2019-04-04">4 april 2019</span>. Geraadpleegd op <span class="mw-formatted-date" title="2019-04-04">4 april 2019</span>. </span></span> </li> </ol></div></div> </div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Overgenomen van "<a dir="ltr" href="https://nl.wikipedia.org/w/index.php?title=Parts_per_million&oldid=67616728">https://nl.wikipedia.org/w/index.php?title=Parts_per_million&oldid=67616728</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Categorie:Alles" title="Categorie:Alles">Categorieën</a>: <ul><li><a href="/wiki/Categorie:Niet-SI-eenheid" title="Categorie:Niet-SI-eenheid">Niet-SI-eenheid</a></li><li><a href="/wiki/Categorie:Stoichiometrie" title="Categorie:Stoichiometrie">Stoichiometrie</a></li><li><a href="/wiki/Categorie:Toxicologie" title="Categorie:Toxicologie">Toxicologie</a></li><li><a href="/wiki/Categorie:Klimatologie" title="Categorie:Klimatologie">Klimatologie</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> Deze pagina is voor het laatst bewerkt op 2 jun 2024 om 16:04.</li> <li id="footer-info-copyright">De tekst is beschikbaar onder de licentie <a rel="nofollow" class="external text" href="//creativecommons.org/licenses/by-sa/4.0/deed.nl">Creative Commons Naamsvermelding/Gelijk delen</a>, er kunnen aanvullende voorwaarden van toepassing zijn. 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