University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Website: @unf

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Classification: Plant -> grass -> rye

Citations 1

"Online Preconcentration Of Nickel By Carbonyl Vaporization With Flow Injection And Continuous-flow Systems In Combination With Sensitive Determination By Electrothermal Atomic Absorption Spectrometry"
Analyst 1995 Volume 120, Issue 11 Pages 2699-2705
Dietmar Erber and Karl Cammann

Abstract: A carrier stream of 0.08 M H2SO4 containing the sample was merged with a stream of 1% NaBH4. The solution was then merged with a stream of CO and the mixture was passed through a 20 cm reaction coil. The Ni(CO)4 produced was carried by an Ar stream to a gas/liquid separator and then to a graphite furnace pre-heated to 250°C, where the Ni(CO)4 was decomposed and the Ni produced was trapped on the graphite surface. The trapped Ni was subsequently determined by ETAAS at 232 nm, using an atomization temperature of 2400°C. Both flow injection (FI) and continuous-flow (CF) modes were used for sample introduction, with sample volumes of 0.1-1 and 1-50 ml, respectively. A diagram of the system used is given. Detection limits were 0.18 and 0.01 µg/l of Ni for FI and CF modes, respectively. The RSD (n value not given) was 3%. The method was applied to two certified reference materials, viz., water and rye grass (Lolium). The results obtained agreed with the certified values for Ni.
Nickel Spectrophotometry Method comparison Reference material Volatile generation Preconcentration Volatile generation