Standard Swedish standard · SS-EN ISO 787-4:2017

General methods of test for pigments and extenders - Part 4: Determination of acidity or alkalinity of the aqueous extract (ISO 787-4:1981)

Status: Valid

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Standard Swedish standard · SS-EN ISO 787-4:2017

General methods of test for pigments and extenders - Part 4: Determination of acidity or alkalinity of the aqueous extract (ISO 787-4:1981)
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Scope
The principle of the method consists in the hot extraction of the material by following the procedure specified in ISO 787/3, to the stage of obtaining a perfectly clear filtrate. The determination is carried out with indicator solution (method A). If the solution with the methyl red indicator is yellow (alkaline), titrate it with the hydrochloric acid solution to an orange end-point; if the solution with the methyl red indicator is red (acid), titrate it with the sodium or potassium hydroxide solution to an orange end-point. The other method (method B) is the potentiometric determination. Take 100 ml of the test solution, insert the electrodes of the pH measuring device and read the pH value.

Subjects

Pigments and extenders (87.060.10)


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Standard Swedish standard · SS-EN ISO 787-4:2017

General methods of test for pigments and extenders - Part 4: Determination of acidity or alkalinity of the aqueous extract (ISO 787-4:1981)
Subscribe on standards - Read more Dölj
Price: 636 SEK
standard ikon pdf

PDF

Price: 636 SEK
standard ikon

Paper

Price: 1 017,60 SEK
standard ikon pdf + standard ikon

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Product information

Language: English

Written by: Svenska institutet för standarder

International title:

Article no: STD-8029755

Edition: 1

Approved: 11/21/2017

No of pages: 16