ISO 3197:1975
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Sodium hydroxide for industrial use — Determination of chlorides content — Photometric method
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
18-04-2019
English, French
01-03-1975
Applicable to products having contents, expressed as chlorine, between 2 mg/kg and 50 mg/kg. For contents exceeding 50 mg/kg the method specified in ISO 981 shall be used. The principle consists in the quantitative displacement of the thiocyanate ions of the mercury(II) thiocyanate by the cloride ions contained in the test portion. Reaction of the thiocyanate ions with iron(III) nitrate to form iron(III) thiocyanate (red). Photometric measurement of the colour at a wavelength of about 450 nm.
DevelopmentNote |
Also numbered as BS 6075-7(1981) (09/2005)
|
DocumentType |
Standard
|
Pages |
3
|
PublisherName |
International Organization for Standardization
|
Status |
Withdrawn
|
Standards | Relationship |
NBN T 03 131 : 1980 | Identical |
NFT 20 430 : 76 FD | Identical |
UNE 55602:1978 | Identical |
BS 6075-11:1981 | Methods of sampling and test for sodium hydroxide for industrial use Determination of mercury content (flameless atomic absorption method) |
BS 6075-8:1981 | Methods of sampling and test for sodium hydroxide for industrial use Determination of sulphate content |
BS 6075-9:1981 | Methods of sampling and test for sodium hydroxide for industrial use Determination of calcium and magnesium contents |
BS 6075-10:1981 | Methods of sampling and test for sodium hydroxide for industrial use Determination of mercury content (photometric method) |
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