AUTOMATED PROCEDURE FOR DETERMINATION OF TRACE AMOUNTS OF ALDEHYDES IN DRINKING WATER

摘要

According to method 8315 of the US Environmental Protection Agency, the analysis of aldehydes in drinking water includes manual derivatization, solid-phase extraction and HPLC separation. The procedure is time consuming and labor intensive. A new column-switching technique has been developed to automate the formaldehyde analysis with a standard HPLC system. This method replaces the sample loop on the injection valve of the autosampler with a precolumn where sample cleanup and preconcentration occur. Acetonitrile was used to dissolve the derivatizing reagent and as a system flush to reduce the blank contamination. The method is evaluated for reproducibilities, linearities, spike recoveries and minimum detection limits for two aldehydes. [References: 11]