ISO 1689:1976
ISO 1690:1976
ISO 1691:1976
ISO 1692:1976
ISO 1693:1976
ISO 1694:1976
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ISO 5440:1978
Sodium hexafluorosilicate for industrial use — Determination of phosphate content — Molybdovanadate spectrophotometric method
Automatically translated name:
Sodium hexafluorosilicate for industrial use -- Determination of phosphate content -- Molybdovanadate spectrophotometric method
STANDARD published on 1.10.1978
The information about the standard:
Designation standards: ISO 5440:1978
Publication date standards: 1.10.1978
SKU: NS-432951
The number of pages: 3
Approximate weight : 9 g (0.02 lbs)
Country: International technical standard
Category: Technical standards ISO
The category - similar standards:
Annotation of standard text ISO 5440:1978 :
Description / Abstract: 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.
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