To demonstrate that oxyhalides and bromide can be successfully determined at concentrations required for regulatory standards and guidelines using a Thermo Scientific™ Dionex™ ion chromatography system equipped with a Thermo Scientific™ Dionex™ IonPac™ AS23-4μm column,Thermo Scientific™ Dionex™ CRD 300 Carbonate Removal Device, and a Thermo Scientific™ Dionex™ AERS™ 500 Carbonate Anion Electrolytically Regenerated Suppressor.

Endocrine disrupting compounds (EDCs) include a wide range of compounds that have the potential to interfere with the body’s endocrine system. Drinking water supplies need to be tested for the presence of EDCs because of their effect on hormones. The solid-phase extraction (SPE) method described in this Application Brief provides provides a quick and simple means of concentrating the components using controlled flow rates and volumes that will consistently produce good recoveries.

Due to the carcinogenic nature of nitrosamines at very low levels, new regulations setting detection limits at PPT (ng/L) levels have been set for nitrosamines in drinking water, milk, beer, and food products. EPA Method 521 recommends coconut carbon SPE cartridges and this method can be easily adapted for the analysis of food and beverages.

In this Application Note semivolatile organic compounds were determined in drinking water by SPE and capillary column gas chromatography/mass spectrometry.

Twenty chlorinated pesticides were extracted from drinking water using a Thermo Scientific Dionex AutoTrace 280 Solid Phase Extraction Instrument (AT 280). The efficiency of the Dionex AT280 method was compared to the traditional liquid-liquid phase extraction (LLE). The manual extraction required significantly more time compared to the Dionex AutoTrace 280 instrument. Analyte recovery was improved using the AT280 Automated SPE instrument for the majority of compounds without sacrificing the precision of analysis.