Azinphos-methyl, 100 µg/ml, Toluene, 1ml

Mono-n-butyl phthalate (ring-1,2-13C2, dicarboxyl-13C2, 99%) 100 µg/mL in MTBE, 1,2ml

Tris(2,5-dimethylphenyl) phosphate,1000 µg/mL,isooctane,1mL,

1,2,3,5-Tetrachloronaphthalene, 1.2ml x 50ug/ml, nonane