ISO 3329:1975 PDF
Ammonium nitrate for industrial use — Determination of content of sulphur compounds — Method by reduction and titrimetry
Ammonium nitrate for industrial use — Determination of content of sulphur compounds — Method by reduction and titrimetry
- Статус документа:
- Отменён
- Формат:
- Электронный (PDF)
- Количество страниц:
- 4
- Дата публикации:
- 1 июля 1975 г.
- Издание:
- ISO IS 3329 edition 1 version 1
- ICS:
- 71.060.50
Applicable to products the content of which, expressed as sulphate, is equal to or more than 0.0005 % (m/m). Heating of a test portion in the presence of sodium carbonate, in a fume-cupboard, until the ammonium salts have been eliminated (about 300 °C). Reduction of the sulphureous residue to sulphides by a mixture of hydriodic acid and hypophosphorus acid. Absorption of the hydrogen sulphide evolved in a mixture of sodium hydroxide solution and acetone. Titration of the sulphide with standard volumetric mercury(II) acetate solution in the presence of dithizone as indicator. A typical apparatus for reduction and distillation is shown in a figure.
Технические детали
- Технический комитет
- ISO/TC 47 - Chemistry
- SKU
- ISO 3329:1975
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