EPA Method 9021

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EPA Method 9021:

A sample of water, protected against the loss of volatiles by the elimination of headspace in the sampling container, is transferred to a purging vessel. The volatile organic halides are purged into a pyrolysis furnace using a stream of CO2 and the hydrogen halide (HX) pyrolysis product is trapped and titrated electrolytically using a microcoulometric detector.

Method 9021 determines organically bound halides (chloride, bromide, and iodide) purged from a sample of drinking water or ground water. They are reported as chloride. This method is a quick screening procedure requiring about 10 minutes. The method uses a sparging device, a pyrolysis furnace, and a microcoulometric-titration detector.

Report Number:
SW-846 Ch 5