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Hydride Preconcentration for Inductively Coupled Plasma Optical Emission Spectrometry

Volume 33, Number 4 (Aug. 1979) Page 399-404

Fry, R.C.; Denton, M.B.; Windsor, D.L.; Northway, S.J.


Studies are presented describing an improved application of the NaBH4 reduction of soluble arsenite to form arsine as a preconcentration approach for ultra-trace level arsenic determination by inductively coupled plasma optical emission spectrometry. Specialized analyte introduction techniques are described for elimination of reaction by-products that would normally extinguish a medium power plasma discharge. An approach is presented to minimize the need for background correction and facilitate a superior arsenic detection limit (≤0.03 ng/ml) in a relatively inexpensive 1.2 kW inductively coupled plasma system.