| 摘要: |
| 本研究提出了一种用于检测海水中锌离子（Zn2+）含量的电化学检测方法。该方法首先应用水热法合成SiO2@PDA-Sb复合材料，然后将该复合材料修饰到玻碳电极上制备SiO2@PDA-Sb-Nafion/GCE，利用差分脉冲阳极溶出伏安法（DPASV）对珠江口海水水样中Zn2+进行测定。研究结果表明，Zn2+在SiO2@PDA-Sb-Nafion/GCE上具有较强的溶出峰。在最优条件下，SiO2@PDA-Sb-Nafion/GCE对Zn2+浓度在1~1 000 nmol/L范围内可实现灵敏、准确的检测，Zn2+的检测出限为0.71 nmol/L。加标回收率实验显示Zn2+加标回收率为93.19%~100.12%，表明该方法可应用于现场海水样品Zn2+测定。本方法具有电极制作简单、稳定性和抗干扰性良好，能够提高现有测定方法的检测限和精确度，在现场海水检测痕量Zn2+具有较好的应用前景。 |
| 关键词: 海洋化学 锑原位掺杂 差分脉冲阳极溶出伏安法 痕量锌离子 海水 |
| DOI：10.3969/J.ISSN.2095-4972.2023.01.014 |
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| 基金项目:国家自然科学基金资助项目(41976150)；福建省自然科学基金资助项目（2019J01747） |
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| Antimony in situ doped SiO2@PDA-Sb composite modified electrode for detection of Zn ions in seawater |
| CHANG Suhuai,LAN Wangrong,CHENG Xuelin,HUANG Xuguang |
| (Pollution Control and Monitoring Fujian Provincial University Key Laboratory, Minnan Normal University,Zhangzhou 363000, China;Fujian Provincial Key Laboratory of Modern Separation Analysis Science and Technology, Minnan Normal University, Zhangzhou 363000, China;School of Chemistry, Chemical Engineering and Environment, Minnan Normal University, Zhangzhou 363000, China) |
| Abstract: |
| This study presents an electrochemical detection method for detecting zinc content in seawater. This method firstly uses hydrothermal method to synthesize SiO2@PDA-Sb composite material, and then the composite was modified on glassy carbon electrode to prepare SiO2@PDA-Sb-Nafion/GCE for the determination of Zn2+ in seawater samples from the Pearl River Estuary using differential pulse anodic dissolution voltammetry (DPASV). The results show that Zn2+ has a strong dissolution peak on SiO2@PDA-Sb-Nafion/GCE. Under optimal conditions, SiO2@PDA-Sb-Nafion/GCE detected sensitively and accurately the Zn2+ in range of 1-1 000 nmol/L with detection limit of 0.71 nmol/L. The spike recovery experiment showed that the spike recovery rate of Zn2+ was 93.19%-100.12%, indicating that this method is applicable to the determination of Zn2+ in seawater samples on site. The method has the advantages of simple electrode fabrication, good stability and good anti-interference, and can improve the detection limit and accuracy of the existing determination method. It has a good application prospect for detecting trace Zn2+ in seawater. |
| Key words: marine chemistry antimony in situ doping differential pulse anodic stripping voltammetry trace zinc ion seawater |
