作者：封亚辉¹, 吴成媛², 查燕青¹, 严文勋¹, 许仁富¹, 张秀¹, 戴东情¹

作者单位：1. 南京海关工业产品检测中心，江苏 南京 210009;
2. 南京师范大学食品与制药工程学院，江苏 南京 210023

关键词：MnO₂纳米材料;电化学检测;五氯苯酚

摘要：

五氯苯酚作为一种重要的木材防腐剂，同时也具有强致癌性，为严格控制其用量，研究建立一种木制品中五氯苯酚的电化学检测方法。利用水热法，合成具有良好催化活性的MnO₂纳米棒。利用MnO₂纳米棒修饰丝网印刷电极，研究五氯苯酚在MnO₂ 纳米棒修饰丝网印刷电极上的电化学行为。对缓冲液pH、MnO₂修饰浓度以及修饰量进行优化，结果表明在Tris-HCl缓冲溶液pH为7、MnO₂纳米棒修饰浓度为1 mg/mL、修饰量为5 μL 时，其催化活性最好。在最佳试验条件下，对五氯苯酚的含量进行测定，在0.1~80 mg/L浓度范围内与对应的峰电流呈良好线性关系，检测限为0.028 mg/L，可用于木制品中五氯苯酚的快速检测。

Detection of pentachlorophenol in wood product based on MnO₂ nanomaterials
FENG Yahui¹, WU Chengyuan², ZHA Yanqing¹, YAN Wenxun¹, XU Renfu¹, ZHNAG Xiu¹, DAI Dongqing¹
1. Nanjing Customs District Industrial Products Inspection Center, Nanjing 210009, China;
2. School of Food and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, China
Abstract: Pentachlorophenol is an important wood preservative which should be used under strictly control due to its strong carcinogenicity, so an electrochemical method for the determination of pentachlorophenol in wood product was established. The MnO₂ nanorods was synthesized by hydrothermal method, which showed good catalytic performance. In order to realize the rapid detection method of pentachlorophenol, the electrochemical behavior of pentachlorophenol was studied by using the MnO₂ nanorods modified screen-printed electrode. By optimizing the buffer pH, MnO₂ nanorods concentration and MnO₂ nanorods modification amount, the results showed that the best catalytic activity was obtained at the condition of Tris-HCl buffer (pH 7.0), MnO₂ nanorods (1 mg/mL, 5 μL). Under the optimum experimental conditions, the content of pentachlorophenol can be determined. The proposed sensor had a well linear relationship in the range of 0.1 to 80 mg/L with a detection limit of 0.028 mg/L. Moreover, the analysis of pentachlorophenol in real sample revealed that the proposed biosensor has a promising application in wood product testing.
Keywords: MnO₂ nanorods;electrochemical detection;pentachlorophenol
2021, 47(12):52-57  收稿日期: 2021-06-21;收到修改稿日期: 2021-08-09
基金项目: 国家重点研发计划（2018YFF0215500）
作者简介: 封亚辉（1975-），男，江苏泰兴市人，研究员，主要研究方向为工业品检测
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