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	高分辨电感耦合等离子体质谱法测量~(230)Th/~(232)Th比值及校正方法; Determination of ~(230)Th/~(232)Th and correct methods by High Resolution Inductively Coupled Plasma Mass Spectrometry
	谢胜凯 ; 郭冬发 ; 谭靖 ; 张彦辉 ; 黄秋红 ; 高爱国
	2013-09-15
关键词	230Th/232Th HR-ICP-MS 强峰拖尾校正 230Th/232Th HR-ICP-MS peak tailing correction
英文摘要	快速可靠的230TH/232TH比值测定方法在230TH定年法中非常重要。实验室在前期工作基础上,建立了高分辨电感耦合等离子体质谱法(Hr-ICP-MS)测定天然样品中230TH/232TH比值的方法。影响230TH/232TH比值精确测定的主要因素是测量过程中强峰拖尾效应和仪器的质量歧视等。238u在236u处的强峰拖尾系数236u/238u可用于230TH/232TH比值的强峰拖尾校正,通过测量不同230TH/232TH比值的标准溶液可获得仪器测量230TH/232TH比值的质量歧视校正因子。采取四酸密闭消解法对砂岩样品进行消解,用bIO-rAd Ag 1x8 Cl-型阴离子交换树脂对钍进行分离,进一步纯化后稀释到一定体积在Hr-ICPMS上进行测量。采用空白-标准-空白样品的测量模式对230TH/232TH比值进行测量。实验室标样的测量结果为(7.29±0.34)x10-6,与参考值(7.33±0.17)x10-6一致。; It is very important for the rapid and reliable determination of230Th/232Th in the thorium-230 dating.A method of measuring230Th /232Th in natural samples by high resolution inductively coupled plasma mass spectrometer(HR-ICP-MS) was developed on the base of our former work.The precise and accurate of natural230Th in geology samples is challenging,as the peak tailing to the high intensity of neighboring peak at232Th and the mass discrimination of the instrument.The peak tailing of238U to236U was used to decrease the peak tailing effect of232Th to230Th.The mass discrimination factor K between ture and measured isototpe ratio was calculated after measuring different230Th /232Th ratio solutions.Lab used standard samples was digested in mixed acids of HNO3-HF-HCl-HClO4,and separated by the Bio-rad AG 1×8 Cl-resin.The measurement method of blank-standard-blank- sample procession was used to determinate the230Th /232Th.The measured result of230Th/232Th was at(7.29±0.34)×10-6,which agreed with the reference value of(7.33±0.17)×10-6.
语种	zh_CN
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/125372]
专题	海洋环境－已发表论文
推荐引用方式 GB/T 7714	谢胜凯,郭冬发,谭靖,等. 高分辨电感耦合等离子体质谱法测量~(230)Th/~(232)Th比值及校正方法, Determination of ~(230)Th/~(232)Th and correct methods by High Resolution Inductively Coupled Plasma Mass Spectrometry[J],2013.
APA	谢胜凯,郭冬发,谭靖,张彦辉,黄秋红,&高爱国.(2013).高分辨电感耦合等离子体质谱法测量~(230)Th/~(232)Th比值及校正方法..
MLA	谢胜凯,et al."高分辨电感耦合等离子体质谱法测量~(230)Th/~(232)Th比值及校正方法".(2013).

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