基质匹配-气相色谱质谱法快速测定聚甲基丙烯酸甲酯塑料中6种苯并三唑类紫外线吸收剂含量

王月, 熊大伟, 贺祥珂, 李桂晓, 尉立华, 周霞, 高翠玲

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塑料科技 ›› 2024, Vol. 52 ›› Issue (12) : 102-107. DOI: 10.15925/j.cnki.issn1005-3360.2024.12.020
理化测试

基质匹配-气相色谱质谱法快速测定聚甲基丙烯酸甲酯塑料中6种苯并三唑类紫外线吸收剂含量

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Rapid Determination of Content of Six kinds of Benzotriazole Ultraviolet Absorbers in Polymethyl Methacrylate Plastics by Matrix Matching-Gas Chromatography Mass Spectrometry

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摘要

建立同时测定聚甲基丙烯酸甲酯(PMMA)塑料中6种苯并三唑类紫外线吸收剂含量的基质匹配-外标定量的气相色谱质谱法。将样品剪碎,用甲苯-二氯甲烷(体积比1∶1)混合溶剂超声萃取,正己烷沉淀,经0.22 μm有机滤膜净化过滤后,采用TG-5毛细管色谱柱,不分流进样,全扫描模式进样,气相色谱质谱仪测定,基质匹配-外标法定量。对提取溶剂、时间、基质效应等对比分析,优化质谱参数,研究基质效应变化规律。6种苯并三唑类紫外线吸收剂可以很好地分离,定量准确。在3种浓度加标水平下,回收率为85.4%~104.0%,相对标准偏差为0.7%~5.1%,相关系数在0.996 0以上,检出限为0.7~1.6 mg/kg。该方法操作简单高效,采用基质匹配-外标法定量,结果准确度更高,适用于PMMA塑料中6种紫外线吸收剂含量的准确测定。

Abstract

A matrix matching-external standard quantification method was established for the simultaneous determination of the content of six kinds of benzotriazole ultraviolet absorbers in polymethyl methacrylate (PMMA) plastics. The samples were cut up, extracted using ultrasonic extraction with a mixed solvent of toluene and dichloromethane(volume ratio 1∶1), and then precipitated with n-hexane. After purification and filtration by 0.22 μm organic filter membrane, TG-5 capillary column was used with unsplit stream sampling. The samples were imported by full scan mode, determined by gas chromatography and mass spectrometer, and quantified by matrix matching and external standard method. The extraction solvent, time and matrix effect were analyzed, and the mass spectrum parameters were optimized. Six kinds of benzotriazole ultraviolet absorbers could be separated well and quantified accurately. The recoveries were 85.4%~104.0%, the relative standard deviations were 0.7%~5.1%, the correlation coefficients were above 0.996 0, and the detection limits were 0.7~1.6 mg/kg. The method is simple and efficient, using matrix-matched external standard quantification, which provides higher accuracy, and is suitable for the accurate determination of the content of six ultraviolet absorbers in PMMA plastic.

关键词

气相色谱质谱法 / 聚甲基丙烯酸甲酯塑料 / 紫外线吸收剂 / 基质匹配

Key words

Gas chromatography mass spectrometry / Polymethyl mmethacrylate plastic / Ultraviolet absorber / Matrix matching

中图分类号

O657.71 / O657.63

引用本文

导出引用
王月 , 熊大伟 , 贺祥珂 , . 基质匹配-气相色谱质谱法快速测定聚甲基丙烯酸甲酯塑料中6种苯并三唑类紫外线吸收剂含量. 塑料科技. 2024, 52(12): 102-107 https://doi.org/10.15925/j.cnki.issn1005-3360.2024.12.020
WANG Yue, XIONG Da-wei, HE Xiang-ke, et al. Rapid Determination of Content of Six kinds of Benzotriazole Ultraviolet Absorbers in Polymethyl Methacrylate Plastics by Matrix Matching-Gas Chromatography Mass Spectrometry[J]. Plastics Science and Technology. 2024, 52(12): 102-107 https://doi.org/10.15925/j.cnki.issn1005-3360.2024.12.020

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基金

国家重点研发计划“儿童用品中吸入性化学应激源迁移规律研究”(2022YFF0606203)
泰山学者青年专家项目“消费品中多类化学物质同步筛查技术研究及防控体系建设”

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