烟草科技2024，Vol.57Issue(12)：33-41,9.DOI:10.16135/j.issn1002-0861.2024.0406
可切换亲水溶剂液液微萃取-阳极溶出伏安法检测三乙酸甘油酯中的铅离子
Switchable hydrophilic solvent liquid-liquid microextraction-anodic stripping voltammetry for determination of lead ions in glyceryl triacetate
摘要
Abstract
A method based on switchable hydrophilic solvent liquid-liquid microextraction and anodic stripping voltammetry was developed for the rapid determination of lead ions in glyceryl triacetate samples.The liquid-liquid microextraction was first used to pretreat glyceryl triacetate samples.The buffer solution of the extractant,the amount of NaOH added,the amount of APDC used as a chelating agent and the solvent volume of the dispersant after extraction were studied,and a series of optimal pretreatment methods for glyceryl triacetate were developed.An electrochemical sensing method for the determination of lead ions was also developed by modifying a screen-printed electrode with bismuth nanoparticles.Finally,a method for the determination of lead ion residues in glyceryl triacetate samples was developed by combining the above two methods.The results showed that:1)Under the optimized experimental conditions,the linear range for the determination of lead ions in glyceryl triacetate samples was 2-16 mg/kg,the linear regression equation was y=0.4115x+3.9572 with R2 of 0.9954,and the detection limit was 0.110 mg/kg.2)The anode stripping voltammetry method could realize the determination of lead ions within 5 min.3)The average recoveries and relative standard deviations were 96.5%-99.6%and 0.79%-3.87%,respectively.4)The developed method was accurate and comparable to atomic absorption spectrometry and inductively coupled plasma mass spectrometry for the same determination.This method is simple,fast and accurate,and could rapidly and sensitively determine the trace lead ions in glyceryl triacetate samples.关键词
三乙酸甘油酯/铅离子/阳极溶出伏安法/可切换亲水溶剂/液液微萃取Key words
Glyceryl triacetate/Lead ion/Anodic stripping voltammetry/Switchable hydrophilic solvent/Liquid-liquid microextraction分类
轻工纺织引用本文复制引用
田雨,张奇,杨钰昆,刘晋利,王珺,褚继登,周利峰,刘永宁..可切换亲水溶剂液液微萃取-阳极溶出伏安法检测三乙酸甘油酯中的铅离子[J].烟草科技,2024,57(12):33-41,9.基金项目
中国烟草实业发展中心科技项目"电化学传感检测非固态烟用材料中重金属残留的研究"(ZYSYQ-2022-3). （ZYSYQ-2022-3）
