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Standard ČSN 441393 26.10.1990 preview

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ČSN 441393 (441393)

Coal and lignite. Determination of mercury



STANDARD published on 26.10.1990


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The information about the standard:

Designation standards: ČSN 441393
Classification mark: 441393
Catalog number: 28204
Publication date standards: 26.10.1990
SKU: NS-128567
The number of pages: 12
Approximate weight : 36 g (0.08 lbs)
Country: Czech technical standard
Category: Technical standards ČSN

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The category - similar standards:

Solid fuelsCoals

Annotation of standard text ČSN 441393 (441393):

V této normě jsou zapracovány údaje z PCSN 122-90. Platí pro stanovení obsahu rtuti v černém a hnědém uhlí a uhelném prachu metodou atomové absorpční spektrofotometrie technikou studených par za použití atomového absorbčního spektrofotometru nebo jednoúčelového analyzátoru stopových obsahů rtuti. Metoda AAS: Podstata metody spočívá v mineralizaci vzorku uhlí směsí koncentrovaných kyselin sírové a dusičné a převedení sloučenin rtuti v iontové formě do roztoku, přidání hydroxilaminu - hydrochloridu a chloridu cínatého a redukcí iontů rtuti na kovovou rtuť v podobě par, při použití techniky měření studených par a měření absorbance při délce vlny 253,7 nm. Metoda s TMA 254: Postata metody spočívá v automatické kalibraci, spálení vzorku, prekoncentraci rtuti a vlastního měření koncentrace rtuti. Jednotlivé fáze postupu jsou řízeny mikroprocesorem. Postupy při provádění normalizovaných zkoušek jsou podrobně popsány. ČSN 44 1393 byla schválena 26.10.1990 a nabyla účinnosti od 1.1.1992

Preview of the standard ČSN 441393 (441393)

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