This standard has been revised by ISO 8660:2002
Abstract
Equal volumes of potassium permanganate solution are added to a carpolactam test solution and to a blank (water). After standing for a specified time the absorbance, at a wavelength of 420 nm, of the test solution and of the blank are compared in cells of 5 cm thickness. The permanganat index is the difference between the absorbance of the test sample and that of the blank, multiplied by 100/3. It is a conventional measure of the content of oxidizable impurities.
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Status: WithdrawnPublication date: 1988-04
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Edition: 1Number of pages: 2
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- ICS :
- 71.080.30 Organic nitrogen compounds
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