Abstract：An indirect determination method of sulfate in surface water and groundwater by inductively coupled plasma atomic emission spectrometry was established. After the sample was acidified by hydrochloric acid(1+1) and the interference materials such as carbonate and sulfide was removed by boiling, proper amount of barium standard solution was added to precipitate the sulfate in the solution. The filtrate was collected by dry suction filtration with 0.45 μm filtration membrane. The content of barium in filtrate was determined by inductively coupled plasma atomic emission spectrometry(ICP-AES) with Ba 233.527 nm as analytical line. The consumed amount of barium by sulfate in precipitate could be calculated by subtracting the content of barium in filtrate from total amount of barium added. Thus, the content of sulfate in sample could be indirectly calculated, realizing the determination of sulfate in surface water and groundwater. The results showed that the influence of calcium, magnesium, aluminum, iron, potassium and sodium in surface water and groundwater on determination could be ignored. Meanwhile, the influence of 3.0 mL of hydrochloric acid(1+1) for the acidification of 50.00 mL of water sample could be also ignored. Under the selected experimental conditions, the mass concentration of barium in range of 1.00-50.00 μg/mL was linear to the corresponding emission intensity. The linear correlation coefficient of calibration curve was r=0.999 9. The proposed method was applied to the determination of sulfate in surface water and groundwater samples. The results were consistent with those obtained by ion chromatography, barium chromate spectrophotometry and turbidimetry. The relative standard deviation (RSD, n=7) was less than 2.0%.
王红伟,刘俊娓,路凯,等.离子色谱法同时测定水中的五种阴离子的研究[J].现代科学仪器,2007(2):103-106.WANG Hong-wei,LIU Jun-wei,LU Kai,et al.Simultaneity determination of cation in mineral water by ion chromatography[J].Modern Scientific Instruments,2007(2):103-106.
[3]
李占灵,汪振辉.电位法测定水中硫酸盐的研究[J].周口师范学院学报,2005,22(5):71-72.LI Zhan-ling,WANG Zhen-hui.Study on the determination of sulphate in water using electrode potential[J].Journal of Zhoukou Normal University,2005,22 (5):71-72.
[4]
宋健男,方小芳,滕成君,等.铬酸钡分光光度法(热法)测定水中硫酸盐不确定度评定[J].中国卫生检验杂志(Chinese Journal of Health Laboratory Technology),2009,19(2):440-441.
[5]
高玲,杨元,谯斌宗,等.电感耦合等离子体发射光谱法测定水中硫酸盐方法研究[J].中国卫生检验杂志,2008,18(7):1234-1237.GAO Ling,YANG Yuan,QIAO Bin-zong,et al.Study on determination of sulphate in water by inductively coupled plasma-optical emission spectrometry [J].Chinese Journal of Health Laboratory,2008,18(7):1234-1237.
[6]
阳国运,唐裴颖.电感耦合等离子体发射光谱法测定地表水和地下水中的硫酸根[J].岩矿测试,2009,28(4):176-178.YANG Guo-yun,TANG Pei-ying.Determination of sulfate in surface water and underground water by inductively coupled plasma atomic emission spectrometry[J].Rock and Mineral Analysis,2009,28(4):176-178.
[7]
孙智敏,张德强,孙汉文.火焰原子吸收光谱法间接测定水中硫酸盐[J].理化检验:化学分册,2005,41(8):573-576.SUN Zhi-min,ZHANG De-qiang,SUN Han-wen.Indirect determination of sulfate in water by flame atomic absorption spectrometry[J].Physical Testing and Chemical Analysis Part B:Chemical Analysis,2005,41(8):573-576.
[8]
武景福,赵建明.饮用水中硫酸盐的原子吸收间接测定法[J].环境与健康杂志,2003,20(5):303-304.WU Jing-fu,ZHAO Jian-ming.Indirect determination of sulfate in drinking water by atomic absorption spectrometry [J].Journal of Environment and Health,2003,20(5):303-304.
[9]
郁倩.铬酸钡分光光度法和离子色谱法测定水中硫酸盐的比较[J].职业与健康(Occupation and Health),2004,20(10):56-57.
[10]
邓礼明,黄俊锋,张为朋.超声-酸性铬酸钡分光光度法测定水中硫酸盐[J].中国热带医学,2009,9(2):363-364.DENG Li-ming,HUANG Jun-feng,ZHANG Wei-peng.Determination of sulfate in drinking water by ultrasonic-acid barium chromate spectrophotometry [J].China Tropical Medicine,2009,9(2):363-364.
[11]
龚殿婷,李凤华,樊占国,等.光电比浊法测定硼酸中硫酸根[J].冶金分析,2008,28(8):44-47.GONG Dian-ting,LI Feng-hua,FAN Zhan-guo,et al.Determination of sulfate radical in boric acid by photoelectric turbidimetry [J].Metallurgical Analysis,2008,28(8):44-47.
