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1.暨南大学 基础医学与公共卫生学院,广东 广州 511443
2.暨南大学 环境与气候学院,广东 广州 511443
3.岛津企业管理(中国)有限公司,广东 广州 511443
谢依侨,硕士,实验师,研究方向:环境科学与工程的实验教学及实验室管理,E-mail:1319593552@qq.com
收稿日期:2024-09-12,
修回日期:2024-12-16,
录用日期:2024-12-18,
纸质出版日期:2025-05-15
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陈智,冯泽阳,曾力希,赵晶,王广,张娜,谢依侨.热裂解/气相色谱-质谱联用法测定全血中的聚苯乙烯微塑料及基质效应影响研究[J].分析测试学报,2025,44(05):906-912.
CHEN Zhi,FENG Ze-yang,ZENG Li-xi,ZHAO Jing,WANG Guang,ZHANG Na,XIE Yi-qiao.Study on the Determination of Polystyrene Microplastics in Whole Blood by PY/GC-MS and the Influence of Matrix Effects[J].Journal of Instrumental Analysis,2025,44(05):906-912.
陈智,冯泽阳,曾力希,赵晶,王广,张娜,谢依侨.热裂解/气相色谱-质谱联用法测定全血中的聚苯乙烯微塑料及基质效应影响研究[J].分析测试学报,2025,44(05):906-912. DOI: 10.12452/j.fxcsxb.240912393.
CHEN Zhi,FENG Ze-yang,ZENG Li-xi,ZHAO Jing,WANG Guang,ZHANG Na,XIE Yi-qiao.Study on the Determination of Polystyrene Microplastics in Whole Blood by PY/GC-MS and the Influence of Matrix Effects[J].Journal of Instrumental Analysis,2025,44(05):906-912. DOI: 10.12452/j.fxcsxb.240912393.
为探究热裂解/气相色谱-质谱联用仪(PY/GC-MS)测定全血样品中微塑料的基质效应影响以及建立相关的定量方法,该文以聚苯乙烯微塑料为研究对象,分别采用3种基质和2种前处理方式进行分组实验,以期找到降低基质效应影响的最优前处理方法。结果表明不同基质加标样品均存在显著的基质增强效应,但使用氢氧化钾(KOH)试剂法进行前处理后基质效应的影响明显减弱,且优于目前主流的酶法前处理结果。该方法易于操作,试剂成本低,可应用于大批量样品的前处理,是目前最优的前处理方法。在优化的前处理方法基础上建立了PY/GC-MS测定全血样品中聚苯乙烯微塑料的定量方法,该方法的检出限和定量下限分别为26 ng/mL和100 ng/mL,可用于实际应用。该研究对于其他生物基质中微塑料的定量检测具有重要参考价值。
In order to investigate the matrix effect of microplastics in whole blood samples by pyrolysis gas chromatography-mass spectrometry(PY/GC-MS) and establish a quantitative method,this paper takes polystyrene microplastics as the research object,and uses three substrates and two pretreatment methods respectively to carry out group experiments. In order to find the optimal pretreatment method to reduce the influence of matrix effect. The results showed that there were significant matrix enhancement effects in different matrix supplemented samples. However,the matrix effect after pretreatment with potassium hydroxide(KOH) reagent was significantly weakened,and it was superior to the current mainstream enzymatic pretreatment results. This pretreatment method was significantly superior to enzyme method,easy to operate,and low reagent cost. It can be applied to the pretreatment of large quantities of samples and is currently the optimal pretreatment method. Finally,a quantitative method for determining polystyrene microplastics in whole blood samples using PY/GC-MS was established based on the optimized preprocessing method in this article. This method demonstrates a detection limit of 26 ng/mL and a quantification limit of 100 ng/mL,which can be used for practical applications. The research will have important reference value for the quantitative detection of microplastics in other biological matrices.
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