| 光谱学与光谱分析 |
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| Determination of High Content of Tin in Geochemical Samples by Solid Emission Spectrometry |
| YAO Jian-zhen1, HAO Zhi-hong1*, TANG Rui-ling1, LI Xiao-jing2, LI Wen-ge1, ZHANG Qin1 |
1. Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China
2. Entry-Exit Inspection and Quarantine Bureau of Guilin, Guilin 541000, China |
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Abstract A method for the determination of high content of tin in geochemical samples by solid emission spectrometry was presented. The dedicated high content tin spectrum standard series was developed. K2S2O7, NaF, Al2O3 and carbon powder were used as buffers and Ge was used as internal standard, and the ratio of sample/matrix/buffer is 1∶1∶2. A weak sensitive line (Sn 242.170 0 nm) was used as the analytical line. The technologies of vertical electrodes, AC arc overlap spectrograph, interception of the exposure, quantitative computer translation spectrum and background correction were used. The determination range is 100~22 350 μg·g-1, the detection limit is 16.64 μg·g-1, and the precision is (RSD, n=12) 4.11%~6.46%. The accuracy of the method has been verified by determination of high content of tin in national geochemical standard samples and the results are in agreement with certified value. The method can be used for measurement directly without dilution of high content of tin in geochemical samples, and it greatly improved the detection upper limit for the determination of tin with solid emission spectroscopy and has certain practical value.
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Received: 2013-04-09
Accepted: 2013-07-10
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Corresponding Authors:
HAO Zhi-hong
E-mail: haozhihong@igge.cn
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