流体包裹体CO<sub>2</sub>碳同位素组成的在线连续流分析方法研究

引用本文: 金贵善, 刘汉彬, 张建锋, 韩娟, 邱林飞, 李军杰, 张佳, 石晓. 流体包裹体CO₂碳同位素组成的在线连续流分析方法研究[J]. 分析化学, 2021, 49(1): 137-143. doi: 10.19756/j.issn.0253-3820.201363 shu

Citation: JIN Gui-Shan, LIU Han-Bin, ZHANG Jian-Feng, HAN Juan, QIU Lin-Fei, LI Jun-Jie, ZHANG Jia, SHI Xiao. On-line Continuous Flow Analysis of Carbon Isotopic Composition of CO₂ in Fluid Inclusions[J]. Chinese Journal of Analytical Chemistry, 2021, 49(1): 137-143. doi: 10.19756/j.issn.0253-3820.201363 shu

流体包裹体CO₂碳同位素组成的在线连续流分析方法研究

核工业北京地质研究院, 北京 100029

通讯作者: 刘汉彬,E-mail:hanbinliu@sina.com

基金项目:
国家重点研发计划项目（No.2017YFC0602600）资助。

摘要: 在矿物包裹体中CO₂碳同位素组成的分析中，通常采用离线式机械破碎或者高温加热爆裂的方式将包裹体中的CO₂释放出来，纯化后，利用同位素比质谱仪双路测试其碳同位素组成。本研究设计了一种在线连续流爆裂提取装置，通过气体转换接口Conflo Ⅳ与稳定同位素质谱仪（IRMS）连接，采用高纯氦气作为载气，将石英单矿物的包裹体加热爆裂释放出来，并迅速带离高温区，减少同位素发生交换，液氮冷冻收集的气体加热释放后，经色谱柱分离，测试CO₂碳同位素组成，分析精度优于0.20‰（1 σ）。此外，将进样针连接于此系统，利用碳酸盐标准物质生成CO₂气体，收集并进行测试验证，结果表明，多标准建立碳同位素组成校正曲线的线性相关性（R²=1）较好。此系统可以快速、准确地在线分析矿物包裹体中CO₂碳同位素组成，实验过程全部在线完成，操作流程更加简化，实验效率大幅提高。

关键词:

English

On-line Continuous Flow Analysis of Carbon Isotopic Composition of CO₂ in Fluid Inclusions

Beijing Research Institute of Uranium Geology, Beijing 100029, China

Corresponding author: LIU Han-Bin, hanbinliu@sina.com

Received Date: 20 June 2020
Revised Date: 30 October 2020
Fund Project:
Supported by the National Key Research and Development Project of China (No. 2017YFC0602600).

Abstract: Generally, the off-line method is used to characterize the carbon isotopic composition of CO₂ enclosed in the mineral fluid inclusions. The enclosed CO₂ is first released by mechanical crushing or thermal decrepitation, and then is collected, purified and measured by isotope ratio mass spectrometer (IRMS). Here, an on-line continuous flow analytic system was developed by linking the thermal decrepitation device and IRMS with Conflo Ⅳ. The gas-liquid inclusions were heated and burst out and the released gas was quickly taken away from the high-temperature area by using high-purity He as carrier gas to reduce the isotope exchange. The gas of CO₂ was collected after cooling with liquid nitrogen and then separated by chromatographic column. The separated CO₂ was analyzed by IRMS with an analysis accuracy of 0.2‰ (1σ). By connecting the measurement needle to the system, it could be used to collect and test CO₂ produced by carbonate reference materials. The results showed that the linear correlation of the calibration curves established by several standards was significant, and the carbon isotopic composition of CO₂ within fluid inclusions could be accurately determined. By using this online method, the operation process was simplified, and the experimental efficiency was greatly improved.

Key words:

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

流体包裹体CO₂碳同位素组成的在线连续流分析方法研究

通讯作者: 刘汉彬,E-mail:hanbinliu@sina.com

English

On-line Continuous Flow Analysis of Carbon Isotopic Composition of CO₂ in Fluid Inclusions

Corresponding author: LIU Han-Bin, hanbinliu@sina.com

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

流体包裹体CO2碳同位素组成的在线连续流分析方法研究

通讯作者: 刘汉彬,E-mail:hanbinliu@sina.com

English

On-line Continuous Flow Analysis of Carbon Isotopic Composition of CO2 in Fluid Inclusions

Corresponding author: LIU Han-Bin, hanbinliu@sina.com

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

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CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

流体包裹体CO₂碳同位素组成的在线连续流分析方法研究

On-line Continuous Flow Analysis of Carbon Isotopic Composition of CO₂ in Fluid Inclusions

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs