ISO 4221:1980
Air quality — Determination of mass concentration of sulphur dioxide in ambient air — Thorin spectrophotometric method
Air quality — Determination of mass concentration of sulphur dioxide in ambient air — Thorin spectrophotometric method
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 7
- Дата публикации:
- 1 ноября 1980 г.
- Издание:
- ISO IS 4221 edition 1 version 1
- ICS:
- 13.040.20
Applies to the range of 3,5 to 150 micrograms per cubic metre, assuming an air sample volume of 2 m3 and a sample solution volume of 50 ml. For higher concentrations, dilution of the sample may be necessary.
Abstract
Overview
ISO 4221:1980 - "Air quality - Determination of mass concentration of sulphur dioxide in ambient air - Thorin spectrophotometric method" - specifies a wet-chemical spectrophotometric procedure for measuring sulphur dioxide (SO2) in ambient air. The method covers the typical ambient range of (assuming a 2 m3 air sample and 50 ml absorption solution); higher levels require dilution. It refers to for sampling equipment and is intended for routine environmental monitoring and laboratory analysis.
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