摘要
6价铬离子是具有高致癌性的剧毒污染物之一,可以改变人类DNA转录过程,导致严重的染色体畸变.考虑到Cr(Ⅵ)在生物和环境系统中的高溶解度和迁移性,开发一种廉价灵敏的Cr(Ⅵ)检测方法具有重要的现实意义.通过水热法合成了一例沙漏型磷钼酸盐化合物用于电化学检测Cr(Ⅵ),其分子式为[Mn_(2)(H_(2)O)_(4)Na_(4)(H_(2)O)_(4)]{Mn[P_(4)Mo_(6)O_(31)H_(7)]_(2)}·13H_(2)O.实验结果表明,这种晶体对电化学检测Cr(Ⅵ)具有良好的性能.它的线性浓度范围为5~510μmol/L,灵敏度为120μA/(mmol·L^(-1)),检测限低至0.081μmol/L,完全符合世界卫生组织对于水系统中Cr(Ⅵ)的浓度标准,且具有较好的稳定性和抗干扰能力.该研究为在实际的环境水系统中检测Cr(Ⅵ)提供了一种廉价便捷的方法.
Hexavalent chromium ion is one of the most toxic pollutants with high carcinogenicity that can change the human DNA transcription process and cause severe chromosomic aberration.Considering the high solubility and mobility of Cr(Ⅵ)in biological and environmental systems,it is of great practical significance to develop a low-cost and sensitive method for the detection of Cr(Ⅵ).In this paper,a case of hourglass-type phosphomolybdate[Mn_(2)(H_(2)O)_(4)Na_(4)(H_(2)O)_(4)]{Mn[P_(4)Mo_(6)O_(31)H_(7)]_(2)}·13H_(2)O was synthesized by hydrothermal method for electrochemical detection of Cr(Ⅵ).The experimental results show that this crystal has good performance for electrochemical detection of Cr(Ⅵ)with a wide linear concentration range from 5〜510 μmol/L,sensitivity o.f 120 μA/(mmol·L^(-1)),a low detection limit of 0.081μmol/L,which meets the WHO standard for Cr(Ⅵ)concentration in water systems.Moreover,it also has good stability and anti-interference ability.This work provides a low-cost and convenient method for detecting Cr(Ⅵ)in actual environmental water systems.
作者
安文婷
吴昕瑶
牛佳祺
马媛媛
韩占刚
AN Wenting;WU Xinyao;NIU Jiaqi;MA Yuanyuan;HAN Zhangang(Hebei Key Laboratory of Organic Functional Molecules,National Demonstration Center for Experimental Chemistry Education,College of Chemistry and Materials Science,Hebei Normal University,Hehei Shijiazhuang 050024,China)
出处
《河北师范大学学报（自然科学版）》
CAS
2021年第3期275-282,共8页
Journal of Hebei Normal University：Natural Science
基金
国家自然科学基金(21871076,21901060)
大学生课外学术科技创新基金(AE20209302277)。
关键词
多酸
沙漏型磷钼酸盐
水热合成
电化学检测
Cr(Ⅵ)
polyoxometalate
hourglass-type phosphomolybdate
hydrothermal synthesis
electrochemical detection
Cr(Ⅵ)
