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Screening analysis of RoHS directive hazardous substances (phthalate esters and bromodiphenyl ethers) by novel mass spectrometry using soft ionization

机译:使用软电离的新型质谱对RoHS指令性有害物质(邻苯二甲酸酯和溴代二苯醚)进行筛选分析

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摘要

In 2013, the European Union expanded the list of hazardous substances contained in the RoHS Directive. In addition, certain phthalate esters, such as dibutyl phthalate (DBP), butyl benzyl phthalate (BBP), di-2-ethylhexyl phthalate (DEHP) and diisobutyl phthalate (DIBP), will be categorized as RoHS-prohibited substances starting from July 2019. Although pyrolysis–gas chromatography–mass spectrometry (Py-GC-MS) is a promising analytical method for the screening of phthalate esters, we have developed a novel soft-ionization MS method that is quantitative as well as faster and more convenient for this purpose. The sample was measured three times, after providing the calibration curve using a powdery standard material of SPEX. The data collection time is 5 min, and continuous measurements are completed within 8 min per sample. The mass spectrum was corrected by dividing the intensity by the sample weight. For the coefficient of variation, DBP was 2.9%, BBP was 3.4%, DEHP was 3.6%, and good reproducibility was observed. Precise analyses of phthalate esters using traditional methods can require solvent extraction times of up to 24 h as well as special techniques. Therefore, a screening method that can be easily carried out by anyone within ten minutes is very attractive.
机译:2013年,欧盟扩大了RoHS指令中包含的有害物质清单。此外,从2019年7月开始,某些邻苯二甲酸酯,例如邻苯二甲酸二丁酯(DBP),邻苯二甲酸丁苄酯(BBP),邻苯二甲酸二-2-乙基己酯(DEHP)和邻苯二甲酸二异丁酯(DIBP)将被归类为RoHS禁止物质。尽管热解-气相色谱-质谱(Py-GC-MS)是一种用于筛选邻苯二甲酸酯的有前途的分析方法,但我们已经开发了一种新颖的软电离质谱方法,该方法定量,快速,方便目的。在使用SPEX的粉状标准材料提供校准曲线后,对样品进行了3次测量。数据收集时间为5分钟,每个样品在8分钟内完成连续测量。通过将强度除以样品重量来校正质谱。对于变异系数,DBP为2.9%,BBP为3.4%,DEHP为3.6%,并且观察到良好的重现性。使用传统方法进行邻苯二甲酸酯的精确分析可能需要长达24小时的溶剂萃取时间以及特殊技术。因此,很容易在十分钟之内被任何人进行的筛选方法。

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