CN1291722A - 脉冲极谱法测定微量元素的方法 - Google Patents

脉冲极谱法测定微量元素的方法 Download PDF

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CN1291722A
CN1291722A CN 00134087 CN00134087A CN1291722A CN 1291722 A CN1291722 A CN 1291722A CN 00134087 CN00134087 CN 00134087 CN 00134087 A CN00134087 A CN 00134087A CN 1291722 A CN1291722 A CN 1291722A
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electrode
measuring trace
pulse polarography
trace elements
measuring
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CN 00134087
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陈贯一
陈自强
赵宽
王守印
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TIANJIN INST OF SUPER-CLEAN FILTER TECHNIQUE
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TIANJIN INST OF SUPER-CLEAN FILTER TECHNIQUE
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Priority to CN 00134087 priority Critical patent/CN1291722A/zh
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Abstract

本发明提供一种脉冲极谱法测定微量元素的方法,其特征在于在样液中加入5%～10%的季胺盐;测定底液由20～90%氯化钠水溶液和10～80%乙醇组成。与不加入季胺盐和相应的测定底液相比灵敏度提高了50～70%,并且重现性好,可以测定尿、血、水、奶、饮料以及调味品中的含量在PPm～PPb数量级的金属、类金属微量元素。

Description

脉冲极谱法测定微量元素的方法
本发明涉及一种脉冲极谱法，具体地说是采用脉冲极谱法提高测定尿、血、水、奶、饮料以及调味品中微量元素含量灵敏度、重现性的方法。
中国专利文献CN1031134A，公开了一种新极谱法测定四价硒和六价硒的方法，所用仪器为国产新极谱仪，三电极系统，1．5次或2．5次微分，测定底液组成是亚硫酸钠-盐酸羟胺-碘酸钾-氯化铵．氨水缓冲液，对Se的测定特效无干扰，可以快速、高灵敏、便宜的测定尿、血、水、奶、饮料中的10-12～10-9Se(Ⅳ)和Se(Ⅵ)的方法。
本发明的目的在于提高脉冲极谱法测定微量元素的灵敏性、重现性的方法。
本发明的目的是通过以下手段实现的。
一种脉冲极谱法测定微量元素的方法，包括以下步骤：在样液中加入5％～10％的季胺盐；测定底液由20～90％氯化钠水溶液和10～80％乙醇组成；通入惰性气体保护；采用三电极测量，参比电极、玻璃电极、工作电极，工作电极采用金电极或汞电。季胺盐为DT、CTAB、OT等。
本发明提供的脉冲极谱法测定微量元素的方法，与不加入季胺盐和由20～90％氯化钠水溶液和10～80％乙醇组成的测定底液相比灵敏度提高了50～70％，并且重现性好，可以测定尿、血、水、奶、饮料以及调味品中的含量在PPm～PPb数量级的金属、类金属微量元素。三电极：参比电极、玻璃电极、工作电极，工作电极采用金电极或汞电极效果更佳。
下面结合实施例对本发明详细说明。
实施例1。
采用脉冲极谱法测定尿液中的铅，取10ml的尿液，在尿液中加入0．5ml的DT；测量底液由20％氯化钠水溶液和80％乙醇组成的，定标在50ml-100ml，目的使三电极浸入到溶液中；通入氮气保护；采用三电极测量：参比电极、玻璃电极、工作电极为金电极。
实施例2。
采用脉冲极谱法测定血液中的镉，取10ml的血液，经处理后在血液中加入1ml的CTAB；测量底液由60％氯化钠水溶液和40％乙醇组成的，定标在50ml-100ml，目的使三电极浸入到溶液中；通入氮气保护；采用三电极测量：参比电极、玻璃电极、工作电极为汞电极。
实施例3。
采用脉冲极谱法测定奶中的锌，取10ml的奶，在奶中加入0．8ml的OT；测量底液由50％氯化钠水溶液和50％乙醇组成的，定标在50ml-100ml，目的使三电极浸入到溶液中；通入氮气保护；采用三电极测量：参比电极、玻璃电极、工作电极为汞电极。

Claims (3)

1．一种脉冲极谱法测定微量元素的方法，包括以下步骤：
a．在样液中加入5％～1O％的季胺盐；
b．测定底液由20～90％氯化钠水溶液和10～80％乙醇组成；
c．通入惰性气体保护；
d．测量。
2．如权利要求1所述的测定微量元素的方法，其特征在于季胺盐为DT、CTAB、OT等。
3．如权利要求1或2所述的测定微量元素的方法，其特征在于采用三电极测量，参比电极、玻璃电极、工作电极，工作电极采用金电极或汞电。
CN 00134087 2000-12-12 2000-12-12 脉冲极谱法测定微量元素的方法 Pending CN1291722A (zh)

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CN1291722A true CN1291722A (zh) 2001-04-18

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007006180A1 (fr) * 2005-07-14 2007-01-18 Blincofa Biomedical Technology Corp. Système pour analyser la quantité de traces de substances organiques dans l’urine et son application
CN100346159C (zh) * 2004-05-03 2007-10-31 北京艾联联合科技发展有限公司 痕迹重金属含量的测定试剂

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100346159C (zh) * 2004-05-03 2007-10-31 北京艾联联合科技发展有限公司 痕迹重金属含量的测定试剂
WO2007006180A1 (fr) * 2005-07-14 2007-01-18 Blincofa Biomedical Technology Corp. Système pour analyser la quantité de traces de substances organiques dans l’urine et son application

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