EN 1484:1997
水分析.測定全部有機碳(TOC)和已溶解有機碳(DOC)的導引
Water analysis - Guidelines for the determination of total organic carbon (TOC) and dissolved organic carbon (DOC)
- 標準號
- EN 1484:1997
- 發布
- 1997年
- 發布單位
- 歐洲標準化委員會
- 當前最新
- EN 1484:1997
- 適用范圍
- This European Standard gives guidance forThe determination of organic carbon in drinking water, ground water, surface water, sea water and waste water. It deals with definitions, interferences, reagents,andThe sample pretreatment of water samples with acontent of organic carbon ranging from 0,3 mg/1 to 1000 mg/1 whileThe lower value is only applicable in special cases, for example drinking water, measured with instruments capable of measuringThese lowlevels. Higher concentrations may be determined afterappropriate dilution.This European Standard does not deal withThe instnunent-dependent aspects.in addition to organic carbon,The water sample may contain carbon dioxide or ions of carbonic acid. PriortoThe TOC determination, it is essential thatThisinorganic carbon is removed by purgingThe acidifiedsample with a gas which is free from CO}. and organiccompounds. Alternatively, both total carbon (TC) andtotal inorganic carbon (TIC) may be determined andthe organic carbon content (TOC) may be calculatedby subtractingThe total inorganic carbon fromThe TC.This method is particularly suitable for samples inwhichThe total inorganic carbon is less thanThe TOG.Purgeable organic substances, such as benzene,toluene, cyclohexane, and chloroform may partlyescape upon stripping. InThe presence of thesesubstances,The TOC concentration is determinedseparate玫orThe differential method(TC一TIC=TOC) may be applied. By usingThedifferential method,The value of the TOC should behigher thanThe TIC, or at least of similar size.Cyanide, cyanate, and particles of elemental carbon(soot) when present inThe sample, will be determinedtogether withThe organic carbon.
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