高级检索

    热解吸-气相色谱-质谱法测定进口纺织原料疑似固体废物中四类有害物质的含量

    Determination of Four Types of Hazardous Substances in Suspected Solid Waste of Imported Textile Raw Materials by Gas Chromatography-Mass Spectrometry with Thermal Desorption

    • 摘要: 取0.5 mg进口纺织原料疑似固体废物样品,在接口温度310 ℃、热解吸温度310 ℃、热解吸时间0.3 min下进行解吸后,光稳定剂、抗氧剂、邻苯二甲酸酯类增塑剂、己二酸酯类增塑剂等四类32种有害物质在J&W HP-5MS UI色谱柱上用升温程序分离,电子轰击离子源电离,选择离子监测模式定量。结果显示,32种有害物质的质量均在一定范围内和定量离子峰面积呈线性关系,检出限(3S/N)为0.5~3.0 mg·kg−1;以空白市售棉花为基质进行3个浓度水平的加标回收试验,回收率为80.2%~97.3%,测定值的相对标准偏差(n=6)为3.1%~15%。方法用于22个进口纺织原料疑似固体废物样品的分析,在16个样品中检出了2,4-二叔丁基苯酚或邻苯二甲酸二(2-乙基己基)酯,检出量分别为9.3~135.7 mg·kg−1和3.0~296.4 mg·kg−1

       

      Abstract: The 0.5 mg of suspected solid waste sample of imported textile raw materials was taken, and desorption was conducted at an interface temperature of 310 ℃, a thermal desorption temperature of 310 ℃, and a thermal desorption time of 0.3 min. The 32 hazardous substances of four types including light stabilizers, antioxidants, phthalate plasticizers, and adipate plasticizers were separated on a J&W HP-5MS UI chromatographic column using a temperature program, ionized by electron impact ionization source, and quantified in selected ion monitoring mode. It was shown that linear relationships between values of the masses of the 32 hazardous substances and peak areas of the quantitative ions were kept in definite ranges, with detection limits (3S/N) in the range of 0.5-3.0 mg·kg−1. A blank commercial cotton was used as the matrix for spiked recovery tests at three concentration levels, giving recoveries in the range of 80.2%-97.3%, and RSDs (n=6) of the determined values ranged from 3.1% to 15%. The proposed method was applied to the analysis of 22 suspected solid waste samples of imported textile raw materials, and 2,4-di-tert-butylphenol or di-(2-ethylhexyl) phthalate was detected in 16 samples, with detection amounts in the ranges of 9.3-135.7 mg·kg−1 and 3.0-296.4 mg·kg−1, respectively.

       

    /

    返回文章
    返回