Bromodichloromethane, 100 µg/ml, Methanol, 5ml

2,2',3,3',4,5',6,6'-Octabromodiphenyl ether, 1.2ml x 50ug/ml, toluene

Metolachlor (ring-13C6), 100µg/ml in n-Nonane, 1,2ml

Mefenamic acid