Ethanol in serum control EtOH SE (0.2g/L), 10x3ml

2,2',3,4,4',5,5'-Heptabromo[13C12]diphenyl ether, 1.2ml x 50ug/ml, nonane

1-Chloronaphthalene, 1000µg/ml in MeOH, 1ml

N-ethylperfluoro-1-octanesulfonamidoacetic acid, 1.2ml x 50ug/ml, methanol