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Water quality - Determination of dalapon, trichloroacetic acid and selected haloacetic acids - Method using gas chromatography (GC-ECD and/or GC-MS detection) after liquid-liquid extraction and derivatization
ISO 23631:2006 specifies a method for the determination of dalapon, trichloroacetic acid (TCA), and selected haloacetic acids in groundwater and drinking water by gas chromatography (GC-ECD and/or GC-MS detection) after liquid-liquid extraction and derivatization using diazomethane.
Depending on the matrix, the method is applicable to a concentration range from 0.5 to 10 micrograms per litre. The validated reporting limit of TCA and dalapon is about 0.05 micrograms per litre.
Detection by electron-capture detector (ECD) in general leads to lower detection limits. Detection by mass spectrometry (MS) allows analyte identification.
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