| 黄龙钙华有机碳测定方法的对比研究 |
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| 引用本文： | 李刚,董发勤,代群威,党政,赵玉连.黄龙钙华有机碳测定方法的对比研究[J].岩石矿物学杂志,2018,37(1):152-160. |
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| 作者姓名： | 李刚 董发勤 代群威 党政 赵玉连 |
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| 作者单位： | 西南科技大学环境与资源学院;西南科技大学固体废物处理与资源化教育部重点实验室; |
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| 基金项目： | 国家自然基金项目（41572035，41741026）；西南科技大学研究生创新基金（17ycx041）；四川省科技厅科技支撑计划项目（2016FZ0043） |
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| 摘 要： | 中国四川黄龙钙华不仅具有重要的旅游价值,其有机碳含量对确定区内钙华沉积规律和环境生物的作用与贡献也具有重要意义。钙华有机碳测定的前提是有效去除无机碳,较好保留有机组分并测定,才能够准确地为生物参与钙华沉积提供依据。本文采用酸溶法、消解法、容量法对钙华有机碳含量进行了测定,结果表明:酸溶法会改变有机碳在钙华中所占质量分数,测试结果偏高,并且相对标准偏差(RSD)为23.73%~30.95%,精度较差;消解法对黑色、黄色两种钙华有机碳的测试较为准确,但对白色钙华的测试精度不够理想;容量法测试结果的RSD为3.27%~11.11%,在测定时受钙华组分中干扰物质和外界因素影响。通过横向对比这3种方法的优缺点和测试误差来源,认为消解法适用于钙华有机碳测定。
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| 关 键 词： | 黄龙钙华 有机碳 酸溶法 消解法 容量法 |
| 收稿时间： | 2017/8/16 0:00:00 |
| 修稿时间： | 2017/10/25 0:00:00 |
A comparative study of the method for determining organic carbon of travertine in Huanglong |
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| LI Gang,DONG Fa-qin,DAI Qun-wei,DANG Zheng and ZHAO Yu-lian.A comparative study of the method for determining organic carbon of travertine in Huanglong[J].Acta Petrologica Et Mineralogica,2018,37(1):152-160. |
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| Authors: | LI Gang DONG Fa-qin DAI Qun-wei DANG Zheng and ZHAO Yu-lian |
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| Institution: | School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, China,School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, China;Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Mianyang 621010, China,School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, China;Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Mianyang 621010, China,School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, China and School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, China |
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| Abstract: | The travertine landscape in Huanglong scenic spots has significant tourism value, in addition, organic carbon (OC) of the travertine is key to determining the law of travertine deposition which might be affected by local environmental organisms. In order to precisely provide the basis of the travertine deposition in which microorganisms are involved, it is necessary to remove the inorganic carbonate completely and preserve the part of OC well before measuring the OC of travertine. Determination of OC in travertine was compared between acid dissolution method, digestion method and volumetric method. The results showed that relative standard deviation (RSD) value of the acid dissolution method was from 23.73% to 30.95%, suggesting poor precision. Besides, the acid dissolution method would change the fraction of OC in travertine samples, making the result higher than the fact. The digestion method was more accurate for testing OC in black and yellow travertine, while the precision of the test was low for white travertine. The RSD value of OC tested by volumetric method was from 3.27% to 11.11%, which was influenced by travertine component and extraneous factors. It is found that the digestion method is suitable for OC determination of travertine, based on the data precision and validity in testing organic carbon, the advantage and disadvantages of lateral correlation, and the analysis of error sources between three test methods. |
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| Keywords: | travertine in Huanglong organic carbon acid dissolution method digestion method volumetric method |
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