多壁碳纳米管修饰金膜塑料电极测定儿童用品中的壬基酚  

Determination of Nonylphenol in Children’s Products Based on Multi-walled Carbon Nanotubes Modified Gold Film Plastic Electrode

作　　者：李海玉[1] 宗艺晶[1] 白桦[1] 王婉[1] 吕庆[1] 王志娟[1] 张庆[1] LI Hai-yu;ZONG Yi-jing;BAI Hua;WANG Wan;Lü Qing;WANG Zhi-juan;ZHANG Qing(Chinese Academy of Inspection and Quarantine,Beijing 100176,China)

机构地区：[1]中国检验检疫科学研究院,北京100176

出　　处：《分析测试学报》2021年第3期406-410,共5页Journal of Instrumental Analysis

基　　金：国家市场监督管理总局科技计划项目(2019MK125);市场监管业务综合保障经费-缺陷进口消费品召回项目。

摘　　要：以廉价的聚对苯二甲酸乙二酯(PET)塑料为基底,采用真空离子溅射技术,制备了一种多壁碳纳米管修饰的可抛式金膜塑料工作电极。通过扫描电镜观察修饰电极的表面形貌,利用循环伏安法对不同修饰状态的电极性能进行表征。在优化实验条件下,应用线性扫描伏安对壬基酚(NP)进行分析。结果表明,壬基酚在0.05~5 mg/L范围内,修饰工作电极的峰电流与壬基酚质量浓度呈良好的线性关系,检出限为0.03 mg/L,加标回收率为92.0%~103%,相对标准偏差(RSD)均小于16%。该可抛式电极可小批量化制备,操作简单,成本低,可防止不同样品对电极表面的交叉污染,应用于塑料样品中壬基酚迁移量的测定,结果满意。A novel disposable electrochemical sensor was fabricated by sputtering gold film and modifying multi-walled carbon nanotubes(MWCNTS)on a low-cost polyethylene terephthalate(PET)plastic as electrode substrate.The surface morphology of the working electrode was observed by scanning electron microscopy(SEM).The performance of the working electrode in different stages was characterized by cyclic voltammetry(CV).Under the optimal conditions,the nonylphenol(NP)was investigated by linear sweep voltammetry(LSV).Results showed that there was an excellent linear relationship between peak current of the proposed electrode and nonylphenol in the concentration range of 0.05-5 mg/L,with a detection limit of 0.03 mg/L.The spiked recoveries ranged from 92.0%to 103%with relative standard deviations(RSDs)less than 16%.The proposed electrode is low-cost,easy to fabricate and available for small lot production.Furthermore,it could prevent itself from the cross contamination of electrode surface in different samples.It was applied to the detection of nonylphenol migration from real plastic samples with satisfactory results.

关 键 词：可抛式电极 多壁碳纳米管 金膜 壬基酚 

分 类 号：O657.1[理学—分析化学] O625.3[理学—化学]