{"id":5060,"date":"2026-04-16T09:53:40","date_gmt":"2026-04-16T07:53:40","guid":{"rendered":"https:\/\/scispx.com\/?post_type=instruments&#038;p=5060"},"modified":"2026-10-12T09:18:26","modified_gmt":"2026-10-12T07:18:26","slug":"iso-toc-cube-elementenanalyzer-voor-isotopenverhouding%e2%80%91massaspectrometrie-2","status":"publish","type":"instruments","link":"https:\/\/scispx.com\/nl\/instruments\/iso-toc-cube-elementenanalyzer-voor-isotopenverhouding%e2%80%91massaspectrometrie-2\/","title":{"rendered":"Iso TOC cube"},"content":{"rendered":"<h2>EA-IRMS<\/h2>\n<h3><strong>Wat is de iso TOC cube?\u00a0<\/strong><\/h3>\n<p data-start=\"192\" data-end=\"428\">De iso TOC cube is een elementenanalyzer voor isotopenverhouding\u2011massaspectrometrie (EA\u2011IRMS) waarmee kwantitatieve en isotopische analyse mogelijk is van opgeloste totale organische koolstof (TOC) en totaal gebonden stikstof (TNb) in waterige monsters.<\/p>\n<p data-start=\"400\" data-end=\"663\">Stabiele\u2011isotopenanalyse van opgeloste koolstof en stikstof speelt een cruciale rol bij het begrijpen van biogeochemische kringlopen in aquatische systemen. Omdat opgeloste stoffen een belangrijke transportweg vormen binnen deze cycli, zijn nauwkeurige kwantificering en isotopenanalyse essentieel.<\/p>\n<p data-start=\"665\" data-end=\"886\">De iso TOC cube introduceert hiervoor een hogetemperatuurverbrandingsmethode en is het enige commercieel beschikbare instrument dat zowel TOC\u2011 als TNb\u2011isotopenanalyse rechtstreeks in vloeibare monsters kan uitvoeren.<\/p>\n<h3 data-section-id=\"1ixkx6y\" data-start=\"1481\" data-end=\"1525\"><strong>Hoe wordt TOC\u2011isotoopanalyse uitgevoerd?<\/strong><\/h3>\n<p data-start=\"1527\" data-end=\"1749\">De iso TOC cube gebruikt <strong>hogetemperatuurverbranding<\/strong> in plaats van nat\u2011chemische of UV\u2011oxidatiemethoden. Hierdoor worden alle verbindingen volledig omgezet, inclusief moeilijk afbreekbare stoffen zoals humuszuren en lignine.<\/p>\n<p data-start=\"1751\" data-end=\"1784\"><strong>Dit resulteert in:<\/strong><\/p>\n<ul data-start=\"1785\" data-end=\"1938\">\n<li data-section-id=\"1ghbrvl\" data-start=\"1785\" data-end=\"1820\">Matrix-onafhankelijke metingen<\/li>\n<li data-section-id=\"13xa0ro\" data-start=\"1821\" data-end=\"1880\">Hoge precisie en nauwkeurigheid voor uiteenlopende vloeistofsoorten<\/li>\n<li data-section-id=\"1jn9osm\" data-start=\"1881\" data-end=\"1938\">Betrouwbare prestaties, ook bij moeilijk verbrandbare monsters<\/li>\n<\/ul>\n<p data-start=\"1940\" data-end=\"2079\">Het systeem ondersteunt uiteenlopende matrices, waaronder drinkwater, afvalwater, bodemuitlogingen, suspensies, pekels en mariene monsters.<\/p>\n<h3 data-section-id=\"16vwkvt\" data-start=\"2086\" data-end=\"2133\"><strong>Hoe wordt directe \u03b4\u00b9\u2075N\u2011analyse van TNb gerealiseerd?<\/strong><\/h3>\n<p data-start=\"2135\" data-end=\"2254\">De iso TOC cube is het enige systeem dat directe \u03b4\u00b9\u2075N\u2011isotopenanalyse van totaal gebonden stikstof in waterige monsters mogelijk maakt.<\/p>\n<p data-start=\"2256\" data-end=\"2281\"><strong>Dit wordt mogelijk gemaakt door:<\/strong><\/p>\n<ul data-start=\"2282\" data-end=\"2482\">\n<li data-section-id=\"bmqapa\" data-start=\"2282\" data-end=\"2328\">Een speciaal Low Concentration Module (LCM)<\/li>\n<li data-section-id=\"1ksrs0n\" data-start=\"2329\" data-end=\"2387\">Een ge\u00efntegreerde membraandegasser voor het verwijderen van opgelost N\u2082<\/li>\n<li data-section-id=\"1d9q7cd\" data-start=\"2388\" data-end=\"2482\">Cryogeenvrije thermo\u2011elektrische koeling in combinatie met Advanced Purge and Trap (APT)\u2011technologie<\/li>\n<\/ul>\n<p data-start=\"2484\" data-end=\"2590\">Deze combinatie maakt TNb\u2011detectie mogelijk tot 25 ppm en garandeert een schone scheiding van stikstofsignalen.<\/p>\n<h3 data-section-id=\"1ei6qfm\" data-start=\"2393\" data-end=\"2438\"><strong>Hoge throughput zonder monstervoorbereiding<\/strong><\/h3>\n<p data-start=\"2440\" data-end=\"2583\">De iso TOC cube analyseert vloeibare monsters direct, zonder tijdrovende voorbehandelingsstappen zoals vriesdrogen.<\/p>\n<p data-start=\"2585\" data-end=\"2607\"><strong>Dit zorgt voor:<\/strong><\/p>\n<ul data-start=\"2608\" data-end=\"2746\">\n<li data-section-id=\"lqapwa\" data-start=\"2608\" data-end=\"2665\">Directe bepaling van opgeloste koolstof en stikstof<\/li>\n<li data-section-id=\"12ywnla\" data-start=\"2666\" data-end=\"2719\">Volledige kwantitatieve conversie van alle verbindingen<\/li>\n<li data-section-id=\"117wrzz\" data-start=\"2800\" data-end=\"2820\">Snellere workflows<\/li>\n<li data-section-id=\"1f881sp\" data-start=\"2821\" data-end=\"2848\">Minder handmatige handelingen<\/li>\n<li data-section-id=\"ju1lg7\" data-start=\"2849\" data-end=\"2878\">Onbeheerde 24\/7\u2011werking<\/li>\n<\/ul>\n<h3 data-section-id=\"1ewkm7i\" data-start=\"2983\" data-end=\"3021\"><strong>Ontworpen voor gebruiksgemak en hoge uptime<\/strong><\/h3>\n<p data-start=\"2891\" data-end=\"2973\">Het instrument is ontwikkeld voor betrouwbare langdurige werking met minimale onderhoudsbehoefte.<\/p>\n<p data-start=\"2975\" data-end=\"2995\"><strong>Ontwerpkenmerken:<\/strong><\/p>\n<ul data-start=\"2996\" data-end=\"3239\">\n<li data-section-id=\"sgfgkt\" data-start=\"2996\" data-end=\"3064\">Ge\u00efntegreerde autosampler met 32 posities (optioneel 50 posities)<\/li>\n<li data-section-id=\"bo94bp\" data-start=\"3065\" data-end=\"3096\">Tijdens gebruik bij te vullen<\/li>\n<li data-section-id=\"1bf5ek\" data-start=\"3097\" data-end=\"3144\">Onderhoud zonder gereedschap via klemverbindingen<\/li>\n<li data-section-id=\"vyasa7\" data-start=\"3145\" data-end=\"3189\">Uitschuifbare oven voor gemakkelijke toegankelijkheid<\/li>\n<li data-section-id=\"160ru0z\" data-start=\"3190\" data-end=\"3239\">SALTTRAP-technologie voor monsters met een hoog zoutgehalte<\/li>\n<\/ul>\n<p data-start=\"3241\" data-end=\"3320\">Deze eigenschappen zorgen voor hoge systeemuptime en vereenvoudigde dagelijkse bediening.<\/p>\n<h3 data-section-id=\"m9dslx\" data-start=\"3327\" data-end=\"3376\"><strong>Welke parameters en isotopen kunnen worden geanalyseerd?<\/strong><\/h3>\n<p data-start=\"3378\" data-end=\"3412\">De iso TOC cube is geoptimaliseerd voor:<\/p>\n<ul data-start=\"3413\" data-end=\"3441\">\n<li data-section-id=\"2gvugl\" data-start=\"3413\" data-end=\"3421\">\u03b4\u00b9\u00b3C<\/li>\n<li data-section-id=\"yk98c1\" data-start=\"3422\" data-end=\"3441\">\u03b4\u00b9\u2075N (optioneel)<\/li>\n<\/ul>\n<p data-start=\"3443\" data-end=\"3463\">Voor de analyse van:<\/p>\n<ul data-start=\"3464\" data-end=\"3580\">\n<li data-section-id=\"vakekf\" data-start=\"3464\" data-end=\"3494\">Totaal Organische Koolstof (TOC)<\/li>\n<li data-section-id=\"9zsue6\" data-start=\"3495\" data-end=\"3527\">Totaal anorganisch koolstof (TIC)<\/li>\n<li data-section-id=\"qfj7wv\" data-start=\"3528\" data-end=\"3549\">Totaal koolstof (TC)<\/li>\n<li data-section-id=\"u12kwz\" data-start=\"3550\" data-end=\"3580\">Totaal gebonden stikstof (TNb)<\/li>\n<\/ul>\n<h3 data-section-id=\"1g79i14\" data-start=\"3727\" data-end=\"3769\"><strong>Analytische mogelijkheden en prestaties<\/strong><\/h3>\n<p data-start=\"3771\" data-end=\"3933\">De iso TOC cube ondersteunt een breed concentratie\u2011 en monsterbereik: van sporenconcentraties tot hoge gehalten en van zoetwater tot sterk zoute matrices.<\/p>\n<ul data-start=\"3959\" data-end=\"4175\">\n<li data-section-id=\"1kpfvgx\" data-start=\"3959\" data-end=\"4018\">100% koolstof- en stikstofterugwinning, onafhankelijk van matrix<\/li>\n<li data-section-id=\"2twkly\" data-start=\"4019\" data-end=\"4086\">Gelijktijdige \u03b4\u00b9\u00b3C- en \u03b4\u00b9\u2075N-analyse bij lage concentraties<\/li>\n<li data-section-id=\"1ywwle7\" data-start=\"4087\" data-end=\"4175\">Typische detectieniveaus tot:\n<ul data-start=\"4125\" data-end=\"4175\">\n<li data-section-id=\"1y9ef3a\" data-start=\"4125\" data-end=\"4147\">ca. 1\u202fmg\/L koolstof<\/li>\n<li data-section-id=\"hkz542\" data-start=\"4150\" data-end=\"4175\">ca. 15\u202fmg\/L stikstof<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p data-start=\"3928\" data-end=\"3979\">Ondersteunt vloeistofinjectievolumes tot 3\u202fml<\/p>\n<h3 data-section-id=\"xwlo8g\" data-start=\"5081\" data-end=\"5134\"><strong>Welke toepassingen en voorbeeldtypes worden ondersteund?<\/strong><\/h3>\n<p data-start=\"5136\" data-end=\"5224\">De iso TOC cube is geschikt voor uiteenlopende laboratoria:<\/p>\n<ul data-start=\"5225\" data-end=\"5343\">\n<li data-section-id=\"1gioi45\" data-start=\"5225\" data-end=\"5255\">Milieulaboratoria<\/li>\n<li data-section-id=\"1c2lcbc\" data-start=\"5256\" data-end=\"5284\">Academische onderzoeksinstellingen<\/li>\n<li data-section-id=\"13nz5hj\" data-start=\"5285\" data-end=\"5317\">Kwaliteitscontrolelaboratoria<\/li>\n<li data-section-id=\"8uopgf\" data-start=\"5318\" data-end=\"5343\">Contractlaboratoria<\/li>\n<\/ul>\n<p data-start=\"5345\" data-end=\"5366\"><strong>Typische monstertypes:<\/strong><\/p>\n<ul data-start=\"5367\" data-end=\"5467\">\n<li data-section-id=\"1gczjuv\" data-start=\"5367\" data-end=\"5385\">Drinkwater<\/li>\n<li data-section-id=\"3ar0ne\" data-start=\"5386\" data-end=\"5398\">Zeewater<\/li>\n<li data-section-id=\"1hzbwzr\" data-start=\"5399\" data-end=\"5437\">Afvalwater (influent en effluent)<\/li>\n<li data-section-id=\"1dd8fyh\" data-start=\"5438\" data-end=\"5448\">Pekels<\/li>\n<li data-section-id=\"1knhf0x\" data-start=\"5449\" data-end=\"5467\">Bodemuitlogingen<\/li>\n<\/ul>\n<h3><strong>Analytische specificaties\u00a0<\/strong><\/h3>\n<div>\n<table>\n<tbody>\n<tr>\n<th scope=\"row\"><strong>Maximaal monstervolume<\/strong><\/th>\n<td>Injecties tot 3 ml voor optimale detectie<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\"><strong>Elementair concentratiebereik<\/strong><\/th>\n<td>Opgeloste koolstof: 5 ppm tot 60.000 ppm<br \/>\nOpgeloste stikstof*<strong>:<\/strong> 25 ppm tot 60.000 ppm<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\"><strong>Precisie - elementair (extern, 1\u03c3)<\/strong><\/th>\n<td>Koolstof: &lt; 2 % relatief<br \/>\nStikstof*: &lt; 2 % relatief<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\"><strong>Precisie \u2013 isotopen (extern, 1\u03c3)<\/strong>)<\/th>\n<td>\u03b4\u00b9\u00b3C: 0,1 \u2030<br \/>\n\u03b4\u00b9\u2075N*<strong>:<\/strong> 0.2 \u2030<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\"><strong>Analysetijd<\/strong><\/th>\n<td>~ 5 min in C-modus<br \/>\n~ 15-20 min in CN-modus*<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\"><strong>Opmerking<\/strong><\/th>\n<td>Analysetijd is afhankelijk van monstertype, analysemodus en configuratie<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div id=\"ce2747\" class=\"contentelement frame--default margin-bottom--none primary-color--default ce-grid ce-grid--accordion\">\n<div class=\"\">\n<div class=\"contentelement__inner\">\n<div class=\"accordion__wrapper\">\n<div class=\"accordion\">\n<div id=\"collapse-ce2747\" class=\"accordion__content collapse show\">\n<div class=\"content__inner\">\n<div id=\"ce2746\" class=\"contentelement frame--default margin-bottom--medium primary-color--default ce-text\">\n<div class=\"\">\n<div class=\"contentelement__inner\">\n<div class=\"rtecontent\">\n<p class=\"caption\">* optioneel beschikbaar<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><script type=\"application\/ld+json\">{\n    \"@context\": \"https:\\\/\\\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What is the iso TOC cube?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The iso TOC 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