内标法与外标法在测定餐具洗涤剂中1,4-二噁烷含量的对比研究

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中图分类号：TS207.3 文献标志码：A 文章编号：1674-0270（2025）35-0061-03

Comparative Study of Internal Standard Method and External Standard Method for the Determination of 1,4-Dioxane in Dishwashing Detergents

XIONG Yi (Nanchong Product Quality Supervision and Inspection Institute, Nanchong 637ooo, China)

Abstract:Amongthe potentialrisksubstances indishwashing detergents,1,4-dioxane isan inevitable byproductof the ethoxylation process ofsurfactants. It exhibits clear carcinogenic properties and is dificult to degrade, making ita contaminant of significant concern in regulatory systems worldwide.However,dishwashingdetergents are characterized by complex matrices with high viscosity and surfactant content,and when using headspace gas chromatography-mass spectrometry (HS-GC-MS)for trace analysis,theyare susceptible to matrix efects and injectionfluctuations,which may affct the accuracy ofquantitativeresults.This paperdiscusses in detailthediferences inthe response behaviors of the quantitative methods incomplexdetergent matrices,the mechanismof the error sourcesandthe anti-interference effects, withthe expectationof providing experimentalbases and technical reference for the establishment of a standard system forthedetectionof1,4-dioxane thatisboth highlyeconomicalandscientificallsound,and topromotetheimprovement of the risk control level of product safety in the daily chemical industry.

Key Words: dishwashing detergent; 1,4-dioxane; internal standard method; external standard method

以脂肪醇聚氧乙烯醚硫酸钠（AES）为代表的阴离子表面活性剂是餐具洗涤剂配方中的主要成分，但该类表面活性剂在生产过程中涉及关键的乙氧基化反应，由于工艺条件限制常伴随副反应发生，使得1,4-二嘌烷作为非人为添加的微量杂质残留在最终产品中[]。（剩余4985字）