DS DS/EN ISO 787-19
DS DSEN SO 787-19 1995-SEP-06 General methods of test for pgments - Part 19 Determnaton of water-soluble ntrates Salcylc acd method
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This part of EN ISO 787 specifies a general method of test for determining the water-soluble nitrates in a sample of pigment by a spectrophotometric method using salicylic acid.