Interference Standard 4 Back Catalog number: 52041 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2918.8-100-AN Atrazine-d5 (ethyl-d5),100 µg/mL,acetonitrile,1mL, Price on request 672913 Chlorimuron-ethyl, 100mg Price on request 79044 Parathion methyl Price on request