羧基化碳纳米管修饰碳糊电极伏安法测定食盐中碘酸根

CORC > 厦门大学 > 2008年第14卷

	羧基化碳纳米管修饰碳糊电极伏安法测定食盐中碘酸根; Voltammetric Determination of Iodate Ion in Table Salt by Carboxylic Carbon Nanotubes Modified Carbon Paste Electrode
	李俊华 ; 张复兴 ; 王剑秋 ; 许志锋 ; 曾荣英 ; 余艳 ; LI Jun-hua ; ZHANG Fu-xing ; WANG Jian-qiu ; XU Zhi-feng ; ZENG Rong-ying ; YU yan
刊名	http://electrochem.xmu.edu.cn/CN/abstract/abstract8591.shtml
	2008-11-28
关键词	碳糊电极碳纳米管线性扫描伏安法碘酸根 carbon paste electrode carbon nanotubes linear sweep voltammetry iodate ion
英文摘要	应用羧基化多壁碳纳米管(c-MWCNT)修饰碳糊电极,测定食盐中的碘酸根含量.在0.1 mol/L的NaOH电解液中,当IO3-在羧基化多壁碳纳米管修饰碳糊电极表面富集60 s,电位扫速为300 mV/s时,该修饰电极在线性扫描伏安图上能出现一灵敏的阴极溶出峰,峰电位为-0.52 V,峰电流与IO3-浓度在8.0×10-10~5.0×10-8mol/L和1.0×10-7~3.0×10-6mol/L的范围内成良好线关系,相关系数分别为0.999和0.998,检出限可达1.0×10-11mol/L;该修饰电极无汞,稳定性较好,用于加碘食盐中碘酸根含量的测定灵敏度高,平均回收率为101.1%.循环伏安(CV)测试表明,碘酸根在修饰电极上电化学反应是一不可逆过程,其电极反应标准均相速率常数为0.0109 cm.s-1.; A highly-sensitive and mercury-free method of determining iodate ion in table salt was established based on carboxylic carbon nanotubes modified carbon paste electrode.In 0.1 mol/L NaOH solution,there was a sensitive cathodic stripping peak on voltammograms.The stripping peak potential was-0.52 V when accumulation time of IO-3 at the modified electrode was 60 s and the potential scan rate was 300 mV/s.There was a good liner relationship between the peak current and IO-3 concentration in the range of 8.0×10-10 ～ 5.0×10-8 mol/L and 1.0×10-7 ～ 3.0×10-6 mol/L with the correlation coefficient of 0.999 and 0.998,respectively.The detection limit was 1.0 × 10-11 mol/L.This proposed method had been applied for determination of IO-3 content for the table salt sample and the average recovery was 101.1%.The results of CV test that indicated the electrochemical reaction of iodate ion at the modified electrode was irreversible.The standard rate constant of the cathodic electrode reaction was determined to be 0.0109 cm·s-1.; 作者联系地址：衡阳师范学院化学与材料科学系;哈尔滨学院生命科学与化学学院;; Author's Address: 1.Department of Chemistry and Material Science,Hengyang Normal University,Hengyang 421008,Hunan,China;2.Department of life sciences and chemistry,Haerbin university,Haerbin 150086,China
语种	中文
出版者	厦门大学《电化学》编辑部
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/58141]
专题	2008年第14卷
推荐引用方式 GB/T 7714	李俊华,张复兴,王剑秋,等. 羧基化碳纳米管修饰碳糊电极伏安法测定食盐中碘酸根, Voltammetric Determination of Iodate Ion in Table Salt by Carboxylic Carbon Nanotubes Modified Carbon Paste Electrode[J]. http://electrochem.xmu.edu.cn/CN/abstract/abstract8591.shtml,2008.
APA	李俊华.,张复兴.,王剑秋.,许志锋.,曾荣英.,...&YU yan.(2008).羧基化碳纳米管修饰碳糊电极伏安法测定食盐中碘酸根.http://electrochem.xmu.edu.cn/CN/abstract/abstract8591.shtml.
MLA	李俊华,et al."羧基化碳纳米管修饰碳糊电极伏安法测定食盐中碘酸根".http://electrochem.xmu.edu.cn/CN/abstract/abstract8591.shtml (2008).