Optimaliseren van een methode voor de microcoulometrische bepaling van polaire organohalogeenverbindingen 714301006

Optimaliseren van een methode voor de microcoulometrische bepaling van polaire organohalogeenverbindingen

[ Optimization of the determination of polar organic halogeen compounds by coulometry ]

Fokkert L, Cleven RFMJ, Versteegh JFM

22 p in Dutch 1992

RIVM Rapport 714301006

Toon Nederlands

English Abstract
The usual methods to determine organohalogenic compounds such as extractable organohalogens (EOX), adsorbable organohalogens (AOX) and purgeable organohalogens (POX) do not measure all polar compounds. A procedure is developed for the coulometric measurement of polar compounds in water. Samples with polar compounds are acidified to pH 1,5 and adsorbed on the resin XAD-4. The inorganic halogens are removed by washing with nitrate solution. The XAD-4 columns are eluted with acetone. After combustion of the organohalogens in a furnace, the halogen content is measured coulometrically. The procedure is tested with trichloroacetic iced (TCA). The recovery by the AOX determination was about 25%, whereas the recovery by the new procedure was about 100%.

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_{( 1992-01-31 )}