BS EN ISO 787-19:1995 General methods of test for pigments and extenders - Part 19. Determination of water-soluble nitrates (Salicylic acid method)
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Part XIX of this International Standard specifies a general method of test for determining the water-soluble nitrates in a sample of pigment by a spectrophotometric method using salicylic acid.
method for determining the
Part XIII specifies a water-soluble nitrates in a sample of pigment using Nessler's method.
NOTES
1 When this general method is applicable to a given pigment, a cross-reference to it will be included in the International Standard relating to that pigment, with a note of any detailed modifications which may be needed in view of the special properties of the pigment in question. Only when this general method is not applicable to a particular pigment will a special method for determination of nitrates be specified.
2 It should be noted that the two methods may not necessarily give the same result, and work is being carried out to compare the two methods
Determination of content; Chemical analysis and testing; Test equipment; Paints; Spectrophotometry; Pigments; Quantitative analysis; Aqueous extraction methods; Nitrates