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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NIST 682

Classification: Reference Material -> NIST -> 682 -> High purity zinc

Citations 1

"Determination Of Nickel, Cobalt, Copper, Thorium And Uranium In High-purity Zinc Metal By ICP-MS With Online Matrix Separation"
Anal. Sci. 1995 Volume 11, Issue 1 Pages 13-16

Abstract: Zn metal (5 g) was dissolved in 9 M HCl and evaporated almost to dryness. The residue was dissolved in 50 mL 2 M HCl and a 170 µL portion was injected into a stream of 2 M HCl at 0.4 ml/min. The carrier stream flows through a BIORAD AG1-X8 anion-exchange column (3 cm x 2 mm i.d.) where the matrix Zn was absorbed and the analytes passed directly into the ICP-MS. After 700 s of sample injection the zinc matrix was flushed from the column with 2 M HNO3 at a flow rate of 3 ml/min. The column was regenerated by washing with 2 M HCl at 0.4 ml/min for 300 s. The calibration graphs were linear up to 10 ng/ml for each analyte. The detection limits were 0.12, 0.48, 1.2, 3.1 and 4 ng/g, respectively, for Th, U, Co, Ni and Cu. RSD (n = 3) were 5% at 10 ng/ml. The method was applied to the analysis of high-purity zinc metals and three NIST standard reference zinc standards. Recoveries were 95-116%.
Cobalt Copper Nickel Thorium-232 Uranium Ion exchange Mass spectrometry Column Matrix removal Reference material Resin Biorad