ISO 4221:1980
Current
The latest, up-to-date edition.
Air quality — Determination of mass concentration of sulphur dioxide in ambient air — Thorin spectrophotometric method
Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users
English, French
01-11-1980
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.
| Committee |
ISO/TC 146/SC 3
|
| DocumentType |
Standard
|
| Pages |
7
|
| PublisherName |
International Organization for Standardization
|
| Status |
Current
|
| Standards | Relationship |
| DIN ISO 4221:1990-05 | Identical |
| DIN EN 12720:2014-02 | Identical |
| BS 1747-7:1983 | Identical |
| PN ISO 4221 : 1994 | Identical |
| UNE 77203:1993 | Identical |
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