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    188宝金博页面版: Improved Cd determination in glasses by laser ablation inductively coupled plasma mass spectrometry using nitrogen as a matrix m

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    内容提示： Improved Cd determination in glasses by laser ablationinductively coupled plasma mass spectrometry usingnitrogen as a matrix modifierQian Nia, Zhao Chu Hua,*, Zheng Yu Baoa, Ya Feng ZhangbaState Key Laboratory ofGeological Processes and Mineral Resources, China University ofGeosciences, Wuhan 430074, ChinabLaboratory ofNo. 9 Gold Detachment, Chinese People’s Arming Police Unit, Hainan 570216, ChinaReceived 9 July 2008AbstractThe addition of 5–10 mL min?1nitrogen to the central channel of plasma in Laser...

    文档格式：PDF | 页数：4 | 浏览次数：41 | 上传日期：2015-04-06 11:52:30 | 文档星级：
    Improved Cd determination in glasses by laser ablationinductively coupled plasma mass spectrometry usingnitrogen as a matrix modifierQian Nia, Zhao Chu Hua,*, Zheng Yu Baoa, Ya Feng ZhangbaState Key Laboratory ofGeological Processes and Mineral Resources, China University ofGeosciences, Wuhan 430074, ChinabLaboratory ofNo. 9 Gold Detachment, Chinese People’s Arming Police Unit, Hainan 570216, ChinaReceived 9 July 2008AbstractThe addition of 5–10 mL minÀ1nitrogen to the central channel of plasma in Laser ablation Inductively Coupled Plasma MassSpectrometry (LA-ICP-MS) increases the sensitivities of Cd by a factor of 3 and decreases oxide interferences by one order ofmagnitude, whichallows the direct analysis oftrace levels ofCdinglass samples. This simple methodshows agreat potential forthedirect determination of Cd in various kinds of samples.# 2008 Zhao Chu Hu. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.Keywords: LA-ICP-MS; Cd; MPI-DING glassDirect determination of Cd in geological and environmental samples is often a challenge due to the extremelycomplicated sample matrices involved. The upper continental crust abundance of Cd is only 0.06 ppm [1]. Thus,sample pretreatment is almost always required to enrich Cd and to minimize interferences before determination [2,3].Laser ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) has been widely used for trace elementand isotope ratio determination in solids [4,5]. The capability of LA-ICP-MS has strongly improved since itsintroduction, particularly with the use of a shorter laser wavelength [6] and pulse width [7] and the use of heliuminstead ofargon as ablation gas [8,9]. Advantages ofthis approach include little sample preparation, rapid throughput,spatially resolved analysis and reduced water-related spectral interferences in the ICP. Compared with solutionnebulization ICP-MS, the oxide interferences level in LA-ICP-MS is about one order of magnitude lower [5].However, it is still difficult to accurate determination ofCd in most ofgeological and environmental samples due to thecombination of lower content of Cd and serious oxide and isotope interferences.To enhance analytical capabilities, the additional gases (e.g., N2, He, H2) added into one ofthe three gas flows oftheICP [10–12] or using organic solvent as matrix modifier [13–16] have been extensively studied since the beginning ofthe ICPas ionization source. Nitrogen is one ofthe most widely usedmoleculargases in ICP-MS, andhas been utilizedmainly for the attenuation ofpolyatomic interferences and matrix effects, and the improvement ofthe sensitivity andstability [11,12,17]. The addition of nitrogen to the ICP can be beneficial for analytical purpose in solution ICP-MS.www.elsevier.com/locate/ccletAvailable online at www.sciencedirect.comChinese Chemical Letters 20 (2009) 92–95* Corresponding author.E-mail address: zchu@vip.sina.com (Z.C. Hu).1001-8417/$ –see front matter # 2008 Zhao Chu Hu. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.doi:10.1016/j.cclet.2008.10.001万方数据

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