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ISO 6228:1980

Chemical products for industrial use — General method for determination of traces of sulphur compounds, as sulphate, by reduction and titrimetry
1. 11. 1980.

Опште информације

90.93     18. 1. 2022.

ISO

ISO/TC 47

Međunarodni standard

71.040.40  

francuski   engleski  

Kupovina

Objavljen

Jezik na kome želite da primite dokument.

Apstrakt

Describes a method based on prior conversion of the sulphur compounds in a test portion to sulphate, if required, and reduction of the sulphate ions ti hydrogen sulphide by a mixture of hydriodic and phosphinic acids in the presence of hydrochloric acid. The hydrogen sulphide is entrained in a current of nitrogen and absorbed in a solution of sodium hydroxide in aqueous acetone, followed by titration of the sulphide ions with standard volumetric mercury(II) acetate or nitrate solution in the presence of 1,5-diphenyl-3-thiocarbazone (dithiozone) as indicator.

Životni ciklus

TRENUTNO

OBJAVLJEN
ISO 6228:1980
90.93 Odluka o potvrđivanju standarda
18. 1. 2022.