ISO 15680 Stock Calibration Standard Solution 3 11 Analytes to be used with Internal standard S3, each 2000µg/mL in methanol; unit: 1x5mL 1352.1 Tetrachloroethene [127-18-4] 3954.3 1,3-Dichloropropane [142-28-9] 1691.1 Dibromochloromethane [124-48-1