| 硅同位素标准物质的研制 |
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| 关键词:silicon isotope reference material homogeneity test certification stability |
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| Preparation and Calibration of Reference Material for Silicon Isotope |
| The reference material of silicon isotope in the paper is GTB 1 and GTB 2. GTB 1 is quartz selected from greyish white guartz sandstones in changzhougou Formation of Changchen System, Middle Proterozoic,and GTB 2 is the high purity reagent of silicon dioxide Produced by first Chemical Reagent Factory of Shanghai. According to the stipulation on reference material of metrological technical standard of state, homogeneity tests and certification analyses were carried out by using the SiF 4 method on 33 N samples of the totalsample unites at a weight of 10mg level. Based on variance analyses of the analytec data, the F tests show that all F values are smaller than the respective critical Fvalue at the given freedom. Homogeneity tests and certification analyses show that the silicon isotope composition of reference material samples are homogeneous, the certified value is puite accurate,and the δ 30 Si NBS-28 (‰) values of GTB 1 and GTB 2 are -0.02±0.10 and-2.68±0.10 respectively, The stability inspections through more than two years exhibit no significant change in δ 30 Si values. |
| WAN De-fang,LI Yan-he,SONG He-bin,LIU Zhi-jian.1997.Preparation and Calibration of Reference Material for Silicon Isotope[J].Acta Geoscientica Sinica,18(3):330-335. |
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