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ASTM D7742-11
Standard Practice for Determination of Nonylphenol Polyethoxylates (NPnEO, 3 ≤ n ≤ 18) and Octylphenol Polyethoxylates (OPnEO, 2 ≤ n ≤ n ≤ 12 in Water by Single Reaction Monitoring (SRM) Liquid Chromatography/ Tandem Mass Spe
standard by ASTM...