HIGH SENSITIVE ION-SELECTIVE ELECTRODE FOR THE DETERMINATION OF FLUORIDE BY NITRIC ACID ACTIVATION
摘 要
先在0.5 mol·L-1硝酸介质中活化氟离子选择性电极,再在含硝酸的总离子强度调节混合液(TISAM)中测定氟,线性范围为1×10-7-1×10-2mol·L-1,检出限为1.9 μg·L-1.该方法应用于绿茶饮料、水、牛奶中痕量氟的测定,结果的RSD小于4.8%,回收率在96.1%至1002%之间,对氟离子选择性电极在硝酸介质中的活化机理作了阐述.
Abstract
A highly sensitive method for the determination of traces of fluoride with an activated ion-selective electrode (ISE) is developed in this paper.The ISE was activated by immersing in 0.5 mol·L-1 HNO3 solution,and determination of fluoride was carried out in the total ionic strength adjusting buffer (TISAB) solution containing HNO3 with the activated ISE.Linearity was ranged between 1×10-7-1×10-2mol·L-1 of fluoride ion,with a detection limit of 1.9 μg·L-1.The method has been applied to the determination of trace amounts of fluoride in samples of green tea,drinking water and milk giving RSD′s less than 4.8% and recoveries in the range of 96.1% to 100.2%.Activation mechanism was discussed briefly.
中图分类号 O657.31
所属栏目 工作简报
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收稿日期 2005/3/31
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备注李正平(1965-),男,河北人,教授,主要从事光谱分析及电化学分析工作.
引用该论文: LI Zheng-ping,WANG Bao-jun,SU Yu-qin,SHI Sheng-xun,CHENG Yong-qiang. HIGH SENSITIVE ION-SELECTIVE ELECTRODE FOR THE DETERMINATION OF FLUORIDE BY NITRIC ACID ACTIVATION[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2006, 42(5): 363~365
李正平,王宝君,苏玉芹,石生勋,成永强. 硝酸活化高灵敏度离子选择性电极法测定氟[J]. 理化检验-化学分册, 2006, 42(5): 363~365
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参考文献
【1】Frang M S, Koss J W.Use of a Total Ionic Strength Adjustment Buffer for Electrode Determination of Fluoride in Water Supplies[J].Anal Chem,1968,40(7):1169-1171.
【2】Frang M S, Koss J W.Analysis by Electrode,Results by Microprocessor[M].London: Orion Research,Cambridge,1977.85.
【3】Fuchs C,Dorn D.Fluoride Determination in Plasma by ion Selective Electrodes: A Simplified Method for the Clinical Laboratory[J].Clin Chim Acta,1975,60:157-167.
【4】Ekstrand J A.Micromethod for the Determination of Fluoride in Blood Plasma and Saliva[J].Calcif Tissue Res,1977,23:225-228.
【5】Villa A E.Rapid Method for Determing Very Low Fluoride Consentrations Using an Ion-Selective Electrode[J].Analyst,1988,113:1299-1303.
【6】黄泽南,黄畅.论氟电极的空白电位值及其对测定结果的影响[J].理化检验-化学分册,1999,35(6):270.
【7】Zachariasen W H.Crystal Chemical Studies of the 5f-Series of Elements,XIV,Oxyfluorides,XOF[J].Acta Cryst,1951,4:231-236.
【8】张绍衡,李国童,高文秦.电化学分析法[M].重庆:重庆出版社,1993.61.
【2】Frang M S, Koss J W.Analysis by Electrode,Results by Microprocessor[M].London: Orion Research,Cambridge,1977.85.
【3】Fuchs C,Dorn D.Fluoride Determination in Plasma by ion Selective Electrodes: A Simplified Method for the Clinical Laboratory[J].Clin Chim Acta,1975,60:157-167.
【4】Ekstrand J A.Micromethod for the Determination of Fluoride in Blood Plasma and Saliva[J].Calcif Tissue Res,1977,23:225-228.
【5】Villa A E.Rapid Method for Determing Very Low Fluoride Consentrations Using an Ion-Selective Electrode[J].Analyst,1988,113:1299-1303.
【6】黄泽南,黄畅.论氟电极的空白电位值及其对测定结果的影响[J].理化检验-化学分册,1999,35(6):270.
【7】Zachariasen W H.Crystal Chemical Studies of the 5f-Series of Elements,XIV,Oxyfluorides,XOF[J].Acta Cryst,1951,4:231-236.
【8】张绍衡,李国童,高文秦.电化学分析法[M].重庆:重庆出版社,1993.61.
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