NF T30-210

NF T30-210

September 1985
Standard Cancelled

Paints and varnishes. Preparation of acid extracts form paints in liquid or powder form.

The principle of the method consists in the dilution of a sample with a suitable solvent, separation of the pigment by centrifugation. Three methods, dependent on the binder of the product being examined, are described. Extraction of the separated pigment with hydrochloric acid at a ratio of mass:volume of 1:15, except for the determination of "soluble" lead; in that case, extraction is carried out at a ratio of 1:1000. Evaporation to dryness of the liquid portion obtained by centrifuging, analysis by dry ashing and extraction of the ash with nitric acid. For coating materials in powder form, extraction is carried out without prior separation of the binder.

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Main informations

Collections

National standards and national normative documents

Publication date

September 1985

Number of pages

8 p.

Reference

NF T30-210

ICS Codes

87.040   Paints and varnishes

Classification index

T30-210

Print number

1 - 01/08/1985

International kinship

Sumary
Paints and varnishes. Preparation of acid extracts form paints in liquid or powder form.

The principle of the method consists in the dilution of a sample with a suitable solvent, separation of the pigment by centrifugation. Three methods, dependent on the binder of the product being examined, are described. Extraction of the separated pigment with hydrochloric acid at a ratio of mass:volume of 1:15, except for the determination of "soluble" lead; in that case, extraction is carried out at a ratio of 1:1000. Evaporation to dryness of the liquid portion obtained by centrifuging, analysis by dry ashing and extraction of the ash with nitric acid. For coating materials in powder form, extraction is carried out without prior separation of the binder.

Replaced standards (1)
T30-210
February 1983
Standard Cancelled
Paints and varnishes. Determination of the soluble metal content. Preparation of acid extracts from liquid and powder paints.

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