ISO 4315:1977
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The latest, up-to-date edition.
Surface active agents — Determination of alkalinity — Titrimetric method
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02-01-1977
A clear solution of the substance is titrated with a standard volumetric hydrochloric acid solution, in the presence of methyl orange or bromophenol blue as indicator. This method is only applicable when so indicated in the specific standard for each product; in particular, it is not suitable for products containing soaps.
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