Atrazine-desisopropyl, 100µg/ml in AL, 5ml

Fentanyl-D5

Fluorescent Brightener Agent OB-2 [4,4''-Bis(5-methyl-2-benzoxazolyl)stilbene], 97%, 5g

Ethanol standard in serum,0.2g/L,serum, 1.5mL