Ethanol standard in serum,1.0g/L,serum, 1.5mL

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

Difenzoquat

Custom BTEX mixture, variation of S-4218 6 components, each concentration as described below in methanol 1300.6 Benzene, 3000µg/mL 1264.7 Toluene, 3000µg/mL 1268.8 Ethylbenzene, 300µg/mL 1265.8 p-Xylene, 300µg/mL 1266.8m-Xylene, 300µg/mL 1267.8 o-X