EN 15721 Internal Standard Stock Solution, procedure B 1382.2 Ethanol 16mL 8919.5 4-Methyl-2-pentanol 160µL Gives a concentration of approx. 8mg/mL

2-Imidazolidone, 100 µg/ml, Acetonitrile, 5ml

N-?Methylperfluorooctanesulfo?namide,neat,neat,10mg,

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