Evaluation of atomic fluorescence, absorption and emission techniques for the determination of mercury |
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Authors: | M. Okumura K. Fukushi S. N. Willie R. E. Sturgeon |
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Affiliation: | (1) National Research Council of Canada, Institute for Environmental Chemistry, K1A OR9 Ottawa, Ontario, Canada;(2) Department of Chemistry, Shimane University, 690 Matsue, Japan;(3) Kobe University of Mercantile Marine, 658 Kobe, Japan |
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Abstract: | Summary Atomic fluorescence (AFS), absorption (AAS) and emission (AES) systems were evaluated for the determination of inorganic mercury. Identical vapour generation and amalgamation procedures were used to permit direct comparison of the performance of a commercial long-path AAS instrument to laboratory constructed non-dispersive AFS as well as He-MIP based AES instruments. Instrumental noise-limited detection limits (LOD) were 0.94, 2.4, 2.8 pg for AAS, AES and AFS techniques, respectively. Methodological LOD's were found to be blank controlled and similar for all three instruments, viz. 9, 25 and 16 pg for AAS, AFS and AES, respectively. All three systems produced accurate results at the low ng/l concentration, as verified by the analysis of a certified river water reference material (NRCC ORMS-1). |
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