The standard applies to water intended for the preparation of drinking water and drinking water at any stage of preparation with a content per component of at least 0.5 ug/1. When using this method, no interference is encountered from the following halogenated hydrocarbons, which sometimes occur in raw water or drinking water: dichloromethane, tetrachloromethane, 1,2-dichloroethane, 1,1,1-trichloroethane, trichloroethene and tetrachloroethene. Notes 1. If other halogenated hydrocarbons are suspected, it is advis ble to confirm the identity of the trihalomethane peaks in the chromatogram. 2. After the chlorination of drinking water, halogenated acetonitriles and iodine-containing trihalomethanes, such as dichloroiodomethane and bromochloroiodomethane, may be present. The method is not aimed at determining these compounds.
NEN 6498-1986 history
1986NEN 6498-1986 Drinking water Gas chromatographic determination of the trihalogenated methanes contents