DIN EN ISO 787-19-1995 颜料和填料通用试验方法.第19部分:水溶性硝酸盐的测定(水杨酸法)
General methods of test for pigments and extenders - Part 19: Determination of water-soluble nitrates (salicylic acid method) (ISO 787-19:1974); German version EN ISO 787-19:1995
The document specifies a general method for determining the water-soluble nitrates in a sample of pigment by a spectrophotometric method using salicylic acid.