Simple method of determination of iodide at microgram/L level in potable water with preliminary preconcentration by energy dispersive X-ray fluorescence spectrometry.
A simple method for iodide determination in potable water with preliminary preconcentration has been worked out. Iodide was precipitated as palladium (II) iodide on elemental palladium as a carrier, which was obtained by reduction of Pd(II) with sodium thiosulfate. Ammonium chloropalladite was used as a reagent. The volume of water taken for analysis was between 100 and 500 cm3. The precipitate was filtered through a membrane filter, air-dried and directly analyzed by the energy-dispersive x-ray fluorescence (EDXRF) method. 241Am radioisotope was used as a source of exciting radiation. The precision of the method was 7% for iodide mass per filter equal to 2 micrograms. The detection limit amounted to 0.45 microgram of iodide per filter.
Holynska
B
B
Institute of Physics and Nuclear Techniques, Academy of Mining and Metallurgy, Krakow, Poland.
Ostachowicz
B
B
Wegrzynek
D
D
D011232:Chemical Precipitation; D007454:Iodides / Q000032:analysis*; D008832:Microchemistry; D010165:Palladium; D011786:Quality Control; D013052:Spectrometry, X-Ray Emission; D014867:Water / Q000737:chemistry*
D007454:Iodides; D014867:Water; D010165:Palladium