Simple in-line stopped flow photolysis of copper complexes in natural waters using aflow injection system

摘要

The development of an in-line digestion system based on simple UVlamp is reported. The effect of photolysis on the preconcentration ofcopper was investigated using an in-line Chelex-l00 ion-exchangecolumn linked to an atomic absorption spectrometer. Three modelligands, glycine, NTA and EDTA, have been used to demonstratethe effect of the digestion system. In a stopped-flow mode, over 90%of the complexed copper was recovered in the presence of any of thethree ligands. When the UV lamp was turned off, this changed to84, 45 and 2% recovery for the glycine, NTA and EDTAcomplexed copper, respectively. The ability to analyse samples withthe UV lamp on or off means that the device may be used to study thespeciation of the copper.