ISO 2223:1972
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Formaldehyde solutions for industrial use Limit test for heavy metals (excluding iron)
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
14-05-2019
English, French
01-11-1972
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The method detects only the heavy metals present in non-complex form, the sulphides of which are precipitated in acid solution. The method is not specific for any one heavy metal. The principle consists in conversion of heavy metal, such as lead and copper, in acid solution to their sulphides, and comparison of the colour produced with that given by an aliquot volume of standard lead solution treated with hydrogen sulphide in the same way.
| DocumentType |
Standard
|
| Pages |
2
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| Standards | Relationship |
| NBN T 04 038 : 1983 | Identical |
| BS 2942:1957 | Similar to |
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