碳酸根和碳酸氢根野外现场快速检测仪的研发与应用

doi:10.13228/j.boyuan.issn1000-7571.012132

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摘要 CO₃^2-和HCO₃^-含量能够反映碳的地球化学行为和碳循环特征,是重要的地球化学指标。本文利用双电极测量技术,研发一套测量CO₃^2-和HCO₃^-含量的小型野外现场快速检测仪,以一键式操作方式自动完成水质样品中CO₃^2-和HCO₃^-含量的快速检测,满足了野外现场调查要求,提高了野外现场测试效率。该仪器具有较低的检出限,CO₃^2-仪器检出限为0.001 mg/L,HCO₃^-仪器检出限为2.5 mg/L;对1×10^-3 mol/L CO₂标准溶液平行测量7次,CO₃^2-、HCO₃^-分析结果的相对标准偏差(RSD,n=7)分别为4.4%和3.2%,仪器稳定性良好;通过不同测量方法对样品进行了对比试验,测量结果表明仪器具有良好的正确度;同时仪器具有便于携带、分析速度快等野外现场的应用特征。

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	陶迪
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关键词 ：野外现场快速检测仪, 二氧化碳, 碳酸根, 碳酸氢根, pH, 双电极法

Abstract：As the important geochemistry indicators, the contents of CO₃^2- and HCO₃^- could reflect the geochemistry behavior and cycle characteristics of carbon. A small field rapid detector was developed for detecting the contents of CO₃^2- and HCO₃^- based on double electrode measurement technology. The rapid detection of the contents of CO₃^2- and HCO₃^- in water samples was automatically completed with one-button operation mode, which could meet the requirements of field investigation. Moreover, the efficiency of field testing was improved. The instrument had low detection limits: 0.001 mg/L for CO₃^2-, and 2.5 mg/L for HCO₃^-. The standard solution containing 1×10^-3 mol/L CO₂ was measured for 7 times in parallel, and the relative standard deviations (RSD, n=7) of determination results for CO₃^2- and HCO₃^- were 4.4% and 3.2%, respectively. The developed instrument had good stability. The samples were determined by different methods for comparison, and the results showed that the instrument had good accuracy. Meanwhile, it had the characteristics of field application such as easy to carry and fast analysis.

Key words： field rapid detector carbon dioxide carbonate bicarbonate pH double electrode method

收稿日期: 2023-02-20

ZTFLH:	O657.1
	X832

基金资助:国家自然科学基金项目(41877301);国家地质实验测试中心基本科研业务费项目(300025000002043304)

通讯作者: 李松(1978—), 男, 高级工程师, 大学本科, 研究方向为地质样品分析检测和小型仪器研发;E-mail:ccagvip@163.com

作者简介: 陶迪(1981—), 男, 高级工程师, 大学本科, 研究方向为仪器研发; E-mail:taodi@foxmail.com

引用本文:

陶迪, 李松, 战楠, 郭琳, 谢曼曼. 碳酸根和碳酸氢根野外现场快速检测仪的研发与应用[J]. 冶金分析, 2023, 43(12): 60-66. TAO Di, LI Song, ZHAN Nan, GUO Lin, XIE Manman. Development and application of field rapid detector for carbonate and bicarbonate. , 2023, 43(12): 60-66.

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http://yjfx.chinamet.cn/CN/10.13228/j.boyuan.issn1000-7571.012132 或 http://yjfx.chinamet.cn/CN/Y2023/V43/I12/60

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