ISO 3423:1975 PDF
Sulphuric acid and oleums for industrial use — Determination of sulphur dioxide content — Iodometric method
Sulphuric acid and oleums for industrial use — Determination of sulphur dioxide content — Iodometric method
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 3
- Дата публикации:
- 1 ноября 1975 г.
- Издание:
- ISO IS 3423 edition 1 version 1
- ICS:
- 71.060.30
Applicable of products the SO2 content of which is equal to or more than 2 mg/kg. Based on the displacement of the sulphur dioxide present in the test portion by a current of pure nitrogen and absorption in a known volume of iodine solution. Titration of the excess of iodine with standard volumetric sodium thiosulphate solution. The diagram of the glass apparatus for absorption is shown in a figure.
Abstract
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