Verkkokauppa
SFS-EN 62321-7-2:2017:en
Determination of certain substances in electrotechnical products - Part 7-2: Hexavalent chromium - Determination of hexavalent chromium (Cr(VI)) in polymers and electronics by the colorimetric method
Soveltamisala
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IEC 62321-7-2:2017 describes procedures to measure hexavalent chromium, Cr(VI), quantitatively in samples of polymers and electronics. This method employs organic solvent to dissolve or swell the sample matrix, followed by an alkaline digestion procedure to extract Cr(VI) from samples. Studies have shown that organic/alkaline solution is more effective than acidic solution in extracting Cr(VI) from soluble and insoluble samples. Minimal reduction of Cr(VI) to Cr(III) or oxidation of Cr(III) to Cr(VI) occurs under alkaline conditions. The first edition of IEC 62321:2008 was a ‘stand-alone’ standard that included an introduction, an overview of test methods, a mechanical sample preparation as well as various test method clauses. This first edition of IEC 62321-7-2 is a partial replacement of IEC 62321:2008, forming a structural revision and generally replacing Annex C. IEC 62321-7-2 is the final replacement part of the corresponding clauses in IEC 62321:2008.
Tämän julkaisun valmistelusta Suomessa vastaa SESKO ry, puh. 050 571 6048.
IEC 62321-7-2:2017 describes procedures to measure hexavalent chromium, Cr(VI), quantitatively in samples of polymers and electronics. This method employs organic solvent to dissolve or swell the sample matrix, followed by an alkaline digestion procedure to extract Cr(VI) from samples. Studies have shown that organic/alkaline solution is more effective than acidic solution in extracting Cr(VI) from soluble and insoluble samples. Minimal reduction of Cr(VI) to Cr(III) or oxidation of Cr(III) to Cr(VI) occurs under alkaline conditions. The first edition of IEC 62321:2008 was a ‘stand-alone’ standard that included an introduction, an overview of test methods, a mechanical sample preparation as well as various test method clauses. This first edition of IEC 62321-7-2 is a partial replacement of IEC 62321:2008, forming a structural revision and generally replacing Annex C. IEC 62321-7-2 is the final replacement part of the corresponding clauses in IEC 62321:2008.
Tämän julkaisun valmistelusta Suomessa vastaa SESKO ry, puh. 050 571 6048.
Tuoteryhmä(t)
Sidokset
Velvoittavat viittaukset
EN 62321-1:2013 Determination of certain substances in electrotechnical products - Part 1: Introduction and overview
EN ISO 3696:1995 Water for analytical laboratory use - Specification and test methods (ISO 3696:1987)
EN ISO 3696:1995 Water for analytical laboratory use - Specification and test methods (ISO 3696:1987)
Tekninen komitea
Vahvistuspäivä
04.08.2017
Julkaisupäivä
08.08.2017
Painos
1
Sivumäärä
21
Julkaisun kieli
englanti