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Spectral interferences in the quantification of arsenic in water samples by inductively coupled plasma emission spectrometry


, : Spectral interferences in the quantification of arsenic in water samples by inductively coupled plasma emission spectrometry. Spectrochimica Acta Part B Atomic Spectroscopy 41(11): 1203-1210

Wavelength profiles obtained on an inductively couples plasma (ICP) scanning monochromator, were used for confirmation of arsenic in water samples following screening analysis at 193.759 nm on an ICP polychromator. Profile scans of four arsenic atomic lines, i.e. the lines at 189.042, 193.759, 197.262 and 228.812 nm, were investigated as to their usefulness for confirmation and quantification purposes. Background structure was characterized, and detection limits and sensitivity were determined. Three arsenic lines i.e. at 189.042, 193.759 and 228.812 nm were found to have adequate sensitivity and detection limits for establishment of compliance with the maximum permissible South African drinking water criterion for arsenic of 0.3 mg l-1 As. Background structure was found to influence the reliability of the detection limit. Spectral interferences using single element standards of aluminium, cadmium, chromium, cobalt, iron, manganese, sulphur and vanadium were investigated. Significant interferences were found from aluminium, cadmium, chromium, cobalt and vanadium on one or several of the arsenic emission lines tested.

Accession: 006459708

DOI: 10.1016/0584-8547(86)80178-1

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