DIN 38407-42
German standard methods for the examination of water, waste water and sludge - Jointly determinable substances (group F) - Part 42: Determination of selected polyfluorinated compounds (PFC) in water - Method using high performance liquid chromatography and mass spectrometric detection (HPLC/MS-MS) after solid-liquid extraction (F 42)
| Organization: | DIN |
| Publication Date: | 1 March 2011 |
| Status: | active |
| Page Count: | 43 |
| ICS Code (Examination of water for chemical substances): | 13.060.50 |
scope:
This standard specifies a method for the determination of selected perfluoroalkylated substances in drinking, ground and surface water as well as treated waste water. The lower limit of application is 0,01 μg/l, or 0,025 μg/l for treated waste water.
The applicability of the method to further substances, not listed in Table 1, or to further types of water is not excluded, but needs to be checked on a case-by-case basis.
The technical manufacture of perfluoroalkyl compounds by means of electrolytic fluorination of hydrocarbon starting materials results in isomeric mixtures. Therefore, in addition to unbranched isomers, the samples to be examined may also often comprise branched isomers, particularly in the case of the compounds PFOA, PFHxS and PFOS.
As far as PFOS is concerned, significant amounts of branched isomers may be present in environmental samples. Since branched isomers can only partly be separated by means of chromatography, the method described in this standard specifies a convention for quantifying the total content of isomers of the respective perfluoroalkyl sulfonate or perfluoroalkyl carboxylate.
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