EPA Method 551


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EPA Method 551:
DETERMINATION OF CHLORINATION DISINFECTION BYPRODUCTS AND CHLORINATED SOLVENTS IN DRINKING WATER BY LIQUID-LIQUID EXTRACTION AND GAS CHROMATOGRAPHY WITH ELECTRON-CAPTURE DETECTION

Summary:
A 35 mL sample aliquot is extracted with 2 mL of methyl-tert-butyl ether (MTBE). Two ?L of the extract is then injected into a GC equipped with a fused silica capillary column and linearized electron capture detector for separation and analysis. Aqueous calibration standards are also extracted and analyzed in order to compensate for any extraction losses. A typical sample can be extracted and analyzed in 40-50 minutes using the primary column chosen for this method. Confirmation of the eluted compounds may be obtained using a dissimilar column or by the use of GC-MS.

Scope:
This method1-4 is applicable to the determination of analytes in finished drinking water, drinking water during intermediate stages of treatment, and raw source water.

Report Number:
600/4-90-020

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