ISO 1550:1973
$12.35
Potassium hydroxide for industrial use — Determination of sodium content — Flame emission spectrophotometric method
| Published By | Publication Date | Number of Pages |
| ISO | 1973-12 | 5 |
The method is applicable to products having sodium contents greater than 0.01 % (m/m). The principle consists in the dissolution of a test portion, followed by acidification to ph value 1. Atomization of the obtained solution in the burner of a flame spectrophotometer. Measurement of the intensity of the radiation emitted at 589 nm; comparison with the intensity obtained for standard sodium chloride solutions, the acidity and potassium chloride content of which are equivalent to that of the test solution. – Cancels and replaces ISO Recommendation R 1550-1970.
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