pH 12.45 buffer solution (230mL)

4-n-Nonylphenol-2,3,5,6-d4, 100µg/ml in MeOH, 5ml

beta-Endosulfan-d4 (1,1,5,5-d4),100 µg/mL,n-nonane,1mL,

Phosphorous Standards Phosphorus in Light White Mineral Oil, 20Cst Tri-n-butylphosphate, 99+% (Chiron product nr. 1399.19) CAS [126-73-8] Matrix: Isooctane , 20cSt Units: 1x25mL, 1x100mL Isooctane