Simultaneous Determination of Six Flame Retardants in Water
News Jul 24, 2014
Analytical method for the determination of six flame retardants (FRs) from two groups was proposed. These groups included the brominated flame retardants (BFRs) 3,3',5,5'-tetrabromobisphenol A (TBBPA), 1,2,5,6,9,10-hexabromocyclododecane (HBCD) and tetrabromophthalic anhydride (TBPA) and triester organophosphate flame retardants (OPFRs) tris(2,3-dibromopropyl) phosphate (TBPP), ethylhexyl diphenyl phosphate (EHDP) and triphenyl phosphate (TPhP). Reversed phase ultrahigh-performance liquid chromatography (UHPLC) with a UV detector, different chromatographic columns, different mobile phases and gradient elution programmes were used to obtain the best separations within the shortest possible time. Solid-phase extraction (SPE) was examined as a pre-concentration step from distilled water. The column with the highest recoveries (the Bond Elut ENV column gave recoveries over 70 % for all compounds) was then tested on 1-L blank surface water samples. The proposed analytical procedure was applied for the determination of FRs in surface water samples. The concentrations of FRs found in water samples ranged from 0.03 (TPhP) to 3.10 μg L-1 (HBCD). Method detection limits (MDLs) ranged from 0.008 to 0.518 μg L-1, and method quantification limits (MQLs) ranged from 0.023 to 1.555 μg L-1 for all compounds.
The article, "The Simultaneous Determination of Six Flame Retardants in Water Samples Using SPE Pre-concentration and UHPLC-UV Method" is published online in Water, Air and Soil Pollution and is free to access.
Official limits are in place regarding the levels of a multitude of substances that are deemed to be safe and acceptable in drinking water, but to fulfill these requirements analysts need the tools to enable them to do this. We spoke to Yan Liu, and Katariina Majamaa from Thermo Fisher Scientific about their new columns designed to enable rapid separations of contaminants prior to analysis using ion chromatography-mass spectrometry (IC-MS).READ MORE