EPA Method 528 Internal Standard

Chlorothalonil Metabolite R417888-13C2,15N2 sodium salt, 10µg/ml in MeOH, 1ml

D5-Atrazine-desisopropyl, 100 µg/ml, Acetone, 1m

IP 391-95 Performance Standard 4 Analytes, each Wt.% as listed in n-Heptane; units: 1x5mL, 5x5mL Cyclohexane 10.0 mg/mL o-Xylene 5.0mg/mL Dibenzothiophene 0.5mg/mL 9-Methylan