Errors Caused by Nitrates and Nitrites in the Determination of Arsenic by the Distillation Method, and a Means for Their Prevention

Graham, Janna; Smith, Catherine Delano

doi:10.1021/ie50147a015

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It Can Be Heated To Accelerate the Reaction With1

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1922

2023

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“…This may be prevented by using hydrazine sulphate with sodium bromide as the reducing agent, and so simultaneously reducing nitrates, etc., to nitrogen . 36 Minute quantities of arsenic may be quantitatively separated from germanium by treating the solution with a large excess of hydrofluoric acid prior to precipitation with hydrogen sulphide. Fluorogermanic acid is formed and is not precipitated by hydrogen sulphide.3' A quantitative estimation of manganese has been based on its precipitation as manganous.…”

Section: It Can Be Heated To Accelerate the Reaction Withmentioning

confidence: 99%