718689

ISO 5440:1978

Sodium hexafluorosilicate for industrial use -- Determination of phosphate content -- Molybdovanadate spectrophotometric method

standard by International Organization for Standardization , 10/01/1978

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Full Description

Applicable to products having contents, expressed as phosphorus pentoxide, of 0.005 % (m/m) to 0.05 % (m/m). The residue from the determination of the loss of mass according to ISO 5444 is used to prepare the test sample. Dissolution in dilute hydrochloric acid and nitric acid solutions. Formation of the yellow molybdovanadate and spectrophotometric measurement at a wavelength of about 420 nm. Calculation of the content from the measured absorbance.

 

Product Details

Published:
10/01/1978
Number of Pages:
3
File Size:
1 file , 260 KB
Note:
This product is unavailable in Ukraine, Russia, Belarus