IP 436-98 Calibration Curve ASTM D6379-99 3 Analytes, each Wt.% as listed in n-Heptane; unit: 4x1mL one of each Std. Analyte Std. 1 Std.2 Std.3 Std.4 (mg/mL) (mg/mL) (mg/mL) (mg/mL) Cyclohexane