用钠型蒙脱土/碳糊修饰在碳基针孔微电极基体上,制作成组合微电极.由于钠型蒙脱土具有强吸附性和阳离子交换特性,铜离子在这种微修饰电极上于-0.65 V(vs. Ag/AgCl)处被吸附还原,富集在电极表面.从富集电位正向扫描到0.1 V,铜在-0.04 V处产生一个灵敏的阳极溶出峰,峰电流(Ip)与Cu2+在0.50～100 μg/L浓度范围内呈良好的线性关系,富集3 min后,检出限可达0.2 μg/L.应用该电极测定纯铝和铝合金中微量铜,回收率为97.0%～102.0%.
参考文献
| [1] | Horng CJ. .SIMULTANEOUS DETERMINATION OF URINARY ZINC, CADMIUM, LEAD AND COPPER CONCENTRATIONS IN STEEL PRODUCTION WORKERS BY DIFFERENTIAL-PULSE ANODIC STRIPPING VOLTAMMETRY[J].The Analyst: The Analytical Journal of the Royal Society of Chemistry: A Monthly International Publication Dealing with All Branches of Analytical Chemistry,1996(10):1511-1514. |
| [2] | 程介克.痕量元素与痕量分析[J].痕量分析,1986(01):90-110. |
| [3] | Shengshui Hu;Cuiling Xu;Gaiping Wang;Dafu Cui .Voltammetric determination of 4-nitrophenol at a sodium montmorillonite-anthraquinone chemically modified glassy carbon electrode[J].Talanta,2001(1):115-123. |
| [4] | 汪尔康;卢小泉;康敬万.21世纪电分析化学[M].兰州:甘肃文化出版社,2002:281. |
| [5] | 赵凯元;王清 .1-(2-吡啶偶氮)-2-萘酚修饰的铅笔芯电极上铜的阳极溶出伏安特性[J].分析化学,1998,26(07):914. |
| [6] | 赵凯元,王敔清.碳基针孔组合微电极的性能测试与理论验证[J].物理化学学报,2002(02):183-187. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%