EPA Method 624 Internal / Surrogate Standard

Trimethoprim, >98,0%, 25g

Terpenes - Mix 4, 1000μg/ml in Methanol, 5ml

Petrochemical Qualitative Standard C5-C9 5 Analytes, equal Wt.%; unit: 1x1mL neat Use in combination with Petrochemical Quantitative Standard (S-4144) to prepare a calibration mixture covering C5 to C44 for calibrating retention times for boiling po