Direct determination of trace impurities in high purity zinc oxide by high resolution inductively coupled plasma mass spectrometry

Abstract

The determination of trace impurities in high purity zinc oxide by high resolution inductively coupled plasma mass spectrometry (HR-ICP-MS) was investigated. To overcome some potentially problematic spectral interference, measurements were acquired in both middle and high resolution modes. The matrix effects due to the presence of excess HCl and zinc were evaluated. The optimum conditions for the determination were tested and discussed. The standard addition method was employed for quantitative analysis. The detection limits ranged from 0.02μg/g to 6 μg/g depending on the elements. The experimental results for the determination of Na, Mg, Ca, Cr, Mn, Fe, Co, Ni, Cu, Mo, Cd, Sb and Pb in several high purity zinc oxide powders were presented.

Keywords

high purity zinc oxide / trace impurities / high resolution inductively coupled plasma mass spectrometry / spectral interferences / microwave digestion

References

[1] Qiu H L, Liu J S. An ICP-AES Method for Analysis of Impurities Zinc and Its Compounds [J]. Spectroscopy and Spectral Analysis, 1998, 18(5): 580-582.

[2] Zhou W Y, Zhou C S, Liu X X, Xiong X G. Separation of Matrix and Determination of Components in High Pure Zinc by ICP-MS[J]. Mining & Metallurgy, 1999, 8(1): 98-101.

[3] Wang E X. Determination of Impurity in Zinc alloy by Extraction and FAAS[J]. Chinese Battery Industry, 2002, 7(5): 276-278.

[4] Krishna M V B, Arunachalam J. Ultrasound-assisted Extraction Procedure for the Fast Estimation of Major, Minor and Trace Elements in Lichen and Mussel Samples by ICP-MS and ICP-AES[J]. Anal. Chim. Acta., 2004, 522: 179-187.

[5] Sun Y C, Hsieh C H, Lin T S, Wen J C. Determination of Trace Impurities in High Purity Gold by Inductively Coupled Plasma Mass Spectrometry with Prior Matrix Removal by Electrodeposition [J]. Spectrochim. Acta Part B., 2000, 55: 1481-1489.

[6] Panday V K, Becker J S, Dietze H J. Determination of Trace Impurities in Tantalum by Inductively Coupled Plasma Mass Spectrometry after Removal of the Matrix by Liquid-liquid Extraction [J]. Anal. Chim. Acta., 1996, 329: 153-159.

[7] Mykytiuk A P, Semeniuk P, Berman S. Analysis of High Purity Metals and Semiconductor Materials by Glow Discharge Mass Spectrometry [J]. Spectrochimica. Acta. Rev., 1990, 13: 1-10.

[8] Coedo Aurora G, López Teresa D, Alguacil F. On-line Ion-exchange Separation and Determination of Tantalum, Tungsten, Zirconium and Hafnium in high Pure Iron by Flow Injection Inductively Coupled Plasma Mass Spectrometry [J]. Anal. Chim. Acta., 1995, 315: 331-338.

[9] Wang C F, Chin C J, Luo S K, Men L C. Determination of Chronium in Airborne Particulate Matter by High Resolution and Laser Ablation Inductively Coupled Plasma Mass Spectrometry [J]. Anal. Chim. Acta., 1999, 389: 257-266.

[10] Sakao S, Uchida H. Determination of Trace Elements in Shellfish Tissue Samples by Inductively Coupled Plasma Mass Spectrometry[J]. Anal. Chim. Acta., 1999, 382: 215-223.

[11] Nonose N, Kubota M. Non-spectral and Spectral Interferences in Inductively Coupled Plasma High-resolution Mass Spectrometry. Part I. Optical Characteristics of Microplasmas Observed Just Behind the Sampler and the Skimmer in Inductively Coupled Plasma High Resolution Mass Spectrometry[J]. J. Anal. Atom. Spectrom., 2001, 16: 551-559.

[12] Nakane K, Uwamino Y, Morikawa H, Tsuge A, Ishizuka T. Determination of Trace Impurities in High-purity Aluminium Oxide by High Resolution Inductively Coupled Plasma Mass Spectrometry[J]. Anal. Chim. Acta, 1998, 369: 79-85.

[13] Olivares J A, Houk R S. Suppression of Analyte Signal by Various Concomitant Salts in Inductively Coupled Plasma Mass Spectrometry[J]. Anal. Chem., 1986, 58: 20-25.

[14] Axelsson M D, Rodushkin I. Determination of Major and Trace Elements in Sphalerite Using Laser Ablation Double Focusing Sector Field ICP-MS[J]. Journal of Geochemical Exploration, 2001, 72: 81-89.

[15] Rodushkin I, Ruth T. Determination of Trace Metals in Estuarine and Sea-water Reference Materials by High Resolution Inductively Coupled Plasma Mass Spectrometry[J]. J. Anal. Atom. Spectrom., 1997, 12: 1181-1185.

[16] Keil O, Dahmen J, Volmer D A. Automated Matrix Separation and Reconcentration for the Trace Level Determination of Metal Impurities in Ultrapure Inorganic Salts by High-resolution ICP-MS[J]. Fresenius. J. Anal. Chem., 1999, 364: 694-699.