ISO 3328:1975 PDF
Nitric acid for industrial use — Determination of sulphate content — Method by reduction and titrimetry
Nitric acid for industrial use — Determination of sulphate content — Method by reduction and titrimetry
- Статус документа:
- Отменён
- Формат:
- Электронный (PDF)
- Количество страниц:
- 4
- Дата публикации:
- 1 июля 1975 г.
- Издание:
- ISO IS 3328 edition 1 version 1
- ICS:
- 71.060.30
Applicable to products the SO4 content of which is equal to or more than 0.0001 % (m/m). Heating of a test portion to dryness in the presence of sodium carbonate. 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 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 3328:1975