EPA Method 8260B Purgeable Internal Standard

Sulfamethoxazole, 100 µg/ml, Methanol, 1ml

4-Hydroxyphenylacetic acid, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 156-38-7

trans-Nonachlor, 10µg/mL in Cyclohexane, 10ml