电感耦合等离子体质谱法测定地热水中的铬
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摘要
地热水中CO_3~(2-)、HCO_3~-和Cl~-的含量较高,在使用ICP-MS对~(52)Cr进行测定时会形成~(40)Ar~(12)C和~1H~(35)Cl~(16)O的多原子离子干扰,造成ICP-MS不能直接准确测定地热水样中的铬。该文对地热水样进行了前处理,首先加入硝酸调节pH<3,后加热保持微沸2 min放置到室温,最后加入硝酸银溶液,从而消除了CO_3~(2-)、HCO_3~-和Cl~-对测定的干扰,实现了ICP-MS对地热水中微量铬的准确测定。方法的检出限为0.18μg/L,相对标准偏差(RSD)为5.6%,加标回收率为97.63%~106.27%。该方法具有简便、准确、检出限低的特点,可用于地热水样中微量铬的测定。
Thermomineral water contains high concentrations of CO_3~(2-), HCO_3~-and Cl~-. It is easy to form the polyatomic ion~(40)Ar~(12)C and~1H~(35) Cl(16) O,which interferes with the determination of52 Cr in the thermomineral water by inductively coupled plasma-mass spectrometry(ICP-MS), consequently ICP-MS can not quantify chromium in thermomineral water in a direct and correct way. In this paper, the thermomineral water sample was pretreated, hydrogen nitrate was added to regulate pH<3,then the thermomineral water was heated to simmer for 2 min and cooled to room temperature,finally added silver nitrate solution, so the interference from CO_3~(2-), HCO_3~-and Cl~-would be eliminated and the accurate determination of trace chromium in thermomineral water by ICP-MS could be achieved. The detection limit of the method was 0.18 μg/L, relative standard deviation(RSD)was 5.6%, and standard recovery rate was 97.63%~106.27%. The method has the characteristics of simplicity, accuracy, and low detection limit. It can be used to determine trace chromium in thermomineral water.
Thermomineral water contains high concentrations of CO_3~(2-), HCO_3~-and Cl~-. It is easy to form the polyatomic ion~(40)Ar~(12)C and~1H~(35) Cl(16) O,which interferes with the determination of52 Cr in the thermomineral water by inductively coupled plasma-mass spectrometry(ICP-MS), consequently ICP-MS can not quantify chromium in thermomineral water in a direct and correct way. In this paper, the thermomineral water sample was pretreated, hydrogen nitrate was added to regulate pH<3,then the thermomineral water was heated to simmer for 2 min and cooled to room temperature,finally added silver nitrate solution, so the interference from CO_3~(2-), HCO_3~-and Cl~-would be eliminated and the accurate determination of trace chromium in thermomineral water by ICP-MS could be achieved. The detection limit of the method was 0.18 μg/L, relative standard deviation(RSD)was 5.6%, and standard recovery rate was 97.63%~106.27%. The method has the characteristics of simplicity, accuracy, and low detection limit. It can be used to determine trace chromium in thermomineral water.
引文
[1]蔺文静,刘志明,王婉丽,等.中国地热资源及其潜力评估[J].中国地质,2013,40(1):312-320.Lin Wenjing,Liu Zhiming,Wang Wanli,et al.The assessment of geothermal resources potential of China[J].Geology in China,2013,40(1):312-320.
[2]周总瑛,刘世良,刘金侠.中国地热资源特点与发展对策[J].自然资源学报,2015,30(7):1210-1221.Zhou Zongying,Liu Shiliang,Liu Jinxia.Study on the characteristics and development strategies of geothermal resource in China[J].Journal of Natural Resource,2015,30(7):1210-1221.
[3]尤伟静,刘延锋,郭明晶.地热资源开发利用过程中的主要环境问题[J].安全与环境工程,2013,20(2):27-28.You Weijing,Liu Yanfeng,Guo Mingjing.Environmental issues in the development and utilization of geothermal resource[J].Safety and Environmental Engineering,2013,20(2):27-28.
[4]左银虎.离子液体萃取二苯碳酰二肼分光光度法测定水中的Cr(Ⅵ)[J].光谱实验室,2011,28(6):3004-3007.Zuo Yinhu.Determination of chromium(Ⅵ)in water by ionic liquid-extraction diphenyl carbazide spectrophotometry[J].Chinese Journal of Spectroscopy Laboratory,2011,28(6):3004-3007.
[5]田佩瑶,刘丽萍.石墨炉原子吸收法测定矿泉水中总铬[J].中国卫生检验杂志,2005,15(3):308-309.Tian Peiyao,Liu Liping.Determination of total chromium in mineral water by graphite furnace atomic absorption spectrometry[J].Chinese Journal of Healthy Laboratory Technology,2005,15(3):308-309.
[6]姜秋俚,孙铁珩,张见昕,等.火焰原子吸收法测定水中的总铬[J].环境保护科学,2011,37(6):94-96.Jiang Qiuli,Sun Tieheng,Zhang Jianxin,et al.Determination of total chromiumin in water by furnace atomic absorption spectrometry[J].Environmental Protection Science,2011,37(6):94-96.
[7]李淑敏,李静,应波.离子色谱法同时测定饮用水中三价铬与六价铬分析方法验证[J].中国卫生检验杂志,2011,21(10):2403-2405.Li Shumin,Li Jing,Ying Bo.Validation on ion chromatographic method for simultaneous determination of tervalent chromium and hexavalent chromium in drinking water[J].Chinese Journal of Healthy Laboratory Technology,2011,21(10):2403-2405.
[8]范哲锋.活性氧化铝分离富集-电感耦合等离子体原子发射光谱法在线测定水中铬(Ⅵ)和铬(Ⅲ)[J].分析化学,2003,31(9):1073-1075.Fan Zhefeng.Determination of chromiumⅢand chromiumⅥin water by activated alumina on-line preconcentration and inductively coupled plasma-atomic emission spectrometry[J].Chinese Journal of Analytical Chemistry,2003,31(9):1073-1075.
[9]冯先进,屈太原.电感耦合等离子体质谱法(ICP-MS)最新应用进展[J].中国无机分析化学,2011,1(1):46-52.Feng Xianjin,Qu Taiyuan.The latest application progress of inductively coupled plasma spectrometry[J].Chinese Journal of Inorganic Analytical Chemistry,2011,1(1):46-52.
[10]沈宇,张尼,高小红,等.微波消解电感耦合等离子体质谱法测定地球化学样品中钒铬镍锗砷[J].岩矿测试,2014,33(5):649-654.Shen Yu,Zhang Ni,Gao Xiaohong,et al.Simultaneous determination of V,Cr,Ni,Ge and As in geochemical samples by ICP-MS combined with microwave digestion sample preparation[J].Rock and Mineral Analysis,2014,33(5):649-654.
[11]李国榕,王亚平,孙元方,等.电感耦合等离子体质谱法测定地质样品中稀散元素铬镓铟碲铊[J].岩矿测试,2010,29(3):255-258.Li Guorong,Wang Yaping,Sun Yuanfang,et al.Determination of Cr,Ga,In,Te and Tl in geological samples by inductively coupled plasma-mass spectrometry[J].Rock and Mineral Analysis,2010,29(3):255-258.
[12]李爱军,王明泰,牟峻,等.气相色谱-质谱法测定动物源食品中10种有机磷农药残留量[J].理化检验-化学分册,2010,46(9):1000-1005.Li Aijun,Wang Mingtai,Mu Jun,et al.GC-MS determination of residual of 10 organophosphorus pesticides in foodstuffs of animal origin[J].Physical Testing and Chemical Analysis Part B(Chemical Analysis),2010,46(9):1000-1005.
[13]刘江晖.ICP-MS测定海产品中汞的含量[J].理化检验-化学分册,2006,42:207-208.Liu Jianghui.ICP-MS method for determination of mercury in marine products[J].Physical Testing and Chemical Analysis Part B(Chemical Analysis),2006,42:207-208.
[2]周总瑛,刘世良,刘金侠.中国地热资源特点与发展对策[J].自然资源学报,2015,30(7):1210-1221.Zhou Zongying,Liu Shiliang,Liu Jinxia.Study on the characteristics and development strategies of geothermal resource in China[J].Journal of Natural Resource,2015,30(7):1210-1221.
[3]尤伟静,刘延锋,郭明晶.地热资源开发利用过程中的主要环境问题[J].安全与环境工程,2013,20(2):27-28.You Weijing,Liu Yanfeng,Guo Mingjing.Environmental issues in the development and utilization of geothermal resource[J].Safety and Environmental Engineering,2013,20(2):27-28.
[4]左银虎.离子液体萃取二苯碳酰二肼分光光度法测定水中的Cr(Ⅵ)[J].光谱实验室,2011,28(6):3004-3007.Zuo Yinhu.Determination of chromium(Ⅵ)in water by ionic liquid-extraction diphenyl carbazide spectrophotometry[J].Chinese Journal of Spectroscopy Laboratory,2011,28(6):3004-3007.
[5]田佩瑶,刘丽萍.石墨炉原子吸收法测定矿泉水中总铬[J].中国卫生检验杂志,2005,15(3):308-309.Tian Peiyao,Liu Liping.Determination of total chromium in mineral water by graphite furnace atomic absorption spectrometry[J].Chinese Journal of Healthy Laboratory Technology,2005,15(3):308-309.
[6]姜秋俚,孙铁珩,张见昕,等.火焰原子吸收法测定水中的总铬[J].环境保护科学,2011,37(6):94-96.Jiang Qiuli,Sun Tieheng,Zhang Jianxin,et al.Determination of total chromiumin in water by furnace atomic absorption spectrometry[J].Environmental Protection Science,2011,37(6):94-96.
[7]李淑敏,李静,应波.离子色谱法同时测定饮用水中三价铬与六价铬分析方法验证[J].中国卫生检验杂志,2011,21(10):2403-2405.Li Shumin,Li Jing,Ying Bo.Validation on ion chromatographic method for simultaneous determination of tervalent chromium and hexavalent chromium in drinking water[J].Chinese Journal of Healthy Laboratory Technology,2011,21(10):2403-2405.
[8]范哲锋.活性氧化铝分离富集-电感耦合等离子体原子发射光谱法在线测定水中铬(Ⅵ)和铬(Ⅲ)[J].分析化学,2003,31(9):1073-1075.Fan Zhefeng.Determination of chromiumⅢand chromiumⅥin water by activated alumina on-line preconcentration and inductively coupled plasma-atomic emission spectrometry[J].Chinese Journal of Analytical Chemistry,2003,31(9):1073-1075.
[9]冯先进,屈太原.电感耦合等离子体质谱法(ICP-MS)最新应用进展[J].中国无机分析化学,2011,1(1):46-52.Feng Xianjin,Qu Taiyuan.The latest application progress of inductively coupled plasma spectrometry[J].Chinese Journal of Inorganic Analytical Chemistry,2011,1(1):46-52.
[10]沈宇,张尼,高小红,等.微波消解电感耦合等离子体质谱法测定地球化学样品中钒铬镍锗砷[J].岩矿测试,2014,33(5):649-654.Shen Yu,Zhang Ni,Gao Xiaohong,et al.Simultaneous determination of V,Cr,Ni,Ge and As in geochemical samples by ICP-MS combined with microwave digestion sample preparation[J].Rock and Mineral Analysis,2014,33(5):649-654.
[11]李国榕,王亚平,孙元方,等.电感耦合等离子体质谱法测定地质样品中稀散元素铬镓铟碲铊[J].岩矿测试,2010,29(3):255-258.Li Guorong,Wang Yaping,Sun Yuanfang,et al.Determination of Cr,Ga,In,Te and Tl in geological samples by inductively coupled plasma-mass spectrometry[J].Rock and Mineral Analysis,2010,29(3):255-258.
[12]李爱军,王明泰,牟峻,等.气相色谱-质谱法测定动物源食品中10种有机磷农药残留量[J].理化检验-化学分册,2010,46(9):1000-1005.Li Aijun,Wang Mingtai,Mu Jun,et al.GC-MS determination of residual of 10 organophosphorus pesticides in foodstuffs of animal origin[J].Physical Testing and Chemical Analysis Part B(Chemical Analysis),2010,46(9):1000-1005.
[13]刘江晖.ICP-MS测定海产品中汞的含量[J].理化检验-化学分册,2006,42:207-208.Liu Jianghui.ICP-MS method for determination of mercury in marine products[J].Physical Testing and Chemical Analysis Part B(Chemical Analysis),2006,42:207-208.