Naproxen, 100 µg/ml, Methanol, 1ml

2,3,7,8-Tetrachloro[13C12]dibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene

2-Methoxy-1-propyl acetate,neat,neat,100mg

Bromodichloromethane, 100 µg/ml, Methanol, 5ml