Phosphate (PO43-) as PO4

(24R)-24-Ethylcholest-2-ene, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 69088-87-5

Acetamiprid, 1000µg/mL in acetonitrile, 1ml

Sulfur Calibration Mixtures: Di-n-butyl sulfide in Heavy White Oil (less than 20mg/kg S) Unit : 10mL screw-capped bottle Light White Mineral Oil Heavy White Mineral Oil (20 cSt at 40°C) (70 cSt at 40°C)