Determination of osmium(VIII) in aqueous solution by d.c. argon plasma atomic emission spectrometry: interference studies

Smolander, Kimmo; Kauppinen, Matti; Mauranen, Ritva

doi:10.1039/an9881300273

Cited by 2 publications

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“…This method, however, is hampered by problems such as poor sensitivity and spectral and chemical interferences from foreign substances [4][5][6][7]. Recently, the determination of osmium by inductively coupled plasma atomic emission spectrometry (ICP-AES), inductively coupled plasma mass spectrometry (ICP-MS) and d.c. argon plasma atomic emission spectrometry has also been reported [8][9][10][11][12]. These methods are highly sensitive but the instrumentation mentioned above is more complex and costly and also these methods may suffer from background emission, spectral and chemical interferences.…”

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Determination of osmium in waste water by graphite furnance atomic absorption spectrometry

et al. 1998

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Abstract. The determination of osmium in wastewater by electrothermal atomic absorption spectrometry (AAS) with a graphite furnace atomiser has been investigated. The atomisation characteristics of osmium on the atomiser were found to result in optimal ashing and atomisation temperatures of 300-500 and 3180 ~ respectively.The characteristic mass (the mass of element giving 0.0044 abs.) of osmium after optimization was found to be 1.6 ng, which is better than obtained with flame AAS and ultraviolet/visible (UV) absorption spectrophotometry. The detection limit (s/n = 3) was 3.6 ng (or 0.36 gg ml-1). The relative std. deviation obtained with graphite furnace AAS was 3.0%.The interference caused by large amounts of common cations and anions in waste water were evaluated and thiourea as matrix modifier was shown to be able to eliminate many interferences. The recovery of osmium spiked in waste water was considered almost satisfactory at the 1-50 gg m1-1 range and the results were shown to well agree with the analytical values obtained by UV absorption spectrophotometry.

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