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首页> 外文期刊>Microchemical Journal: Devoted to the Application of Microtechniques in all Branches of Science >A comparison of different analytical techniques (energy dispersive X-ray fluorescent spectrometry, bomb calorimetry combined with ion chromatography and inductively coupled plasma-optical emission spectrometry) for the determination of the bromine and antimony content of samples
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A comparison of different analytical techniques (energy dispersive X-ray fluorescent spectrometry, bomb calorimetry combined with ion chromatography and inductively coupled plasma-optical emission spectrometry) for the determination of the bromine and antimony content of samples

机译：用于测定样品中溴和锑含量的不同分析技术（能量色散X射线荧光光谱法，炸弹量热法与离子色谱法和电感耦合等离子体光发射光谱法）的比较

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摘要

In recent years, there has been intensive research into the use of pyrolysis to process toxic plastics from waste electrical and electronic equipment (WEEE). During pyrolysis, the fate of the bromine and antimony content of the plastics is critical therefore, new and improved analytical techniques for analysing these elements in the pyrolysis products are being sought. In this work, the effectiveness of energy dispersive x-ray fluorescent spectrometry (EDXRFS) for the determination of bromine and antimony content of pyrolysis oils from waste electrical and electronic equipment have been tested. Samples were obtained by the pyrolysis of brominated high-impact polystyrene (Br-HIPS) and brominated acrylonitrile-butadiene-styrene (Br-ABS) at temperatures from 360 to 440°C. The concentration range of both the bromine and antimony in the samples was very broad (0.05-17.94. wt% and 0.03-8.54. wt% respectively). The results from EDXRFS to those of more traditional and time consuming methods; bomb calorimetry combined with ion chromatography (EPA method 5050) for bromine and acid digestion combined with inductively coupled plasma-optical absorption spectrometry for antimony were compared.Based on our measurements, different statistical parameters were calculated for each analytical technique, which demonstrated that EDXRFS had been successfully applied to the determination of bromine and antimony concentration in the pyrolysis oils of Br-HIPS and Br-ABS. Errors resulting from matrix effects did occur, in particular correlations were found between the nitrogen content of the samples and the difference in bromine and antimony measured by EDXRFS and other methods (ion-chromatography and ICP-OES). However, these differences were found to be statistically insignificant, so we could conclude that EDXRFS is a suitable technique for analysing the bromine and antimony content of pyrolysis oils.
机译：近年来，对使用热解法处理废弃电子电气设备（WEEE）中的有毒塑料进行了深入研究。在热解过程中，塑料中溴的含量和锑的含量至关重要，因此，人们正在寻求新的和改进的分析技术来分析热解产物中的这些元素。在这项工作中，已经测试了能量色散X射线荧光光谱法（EDXRFS）测定废旧电气和电子设备中热解油中溴和锑含量的有效性。通过在360至440°C的温度下热解溴化高抗冲聚苯乙烯（Br-HIPS）和溴化丙烯腈-丁二烯-苯乙烯（Br-ABS）获得样品。样品中的溴和锑的浓度范围非常宽（分别为0.05-17.94。wt％和0.03-8.54。wt％）。从EDXRFS到更传统，更费时的方法的结果;比较了溴的量热法，离子色谱法（EPA方法5050）和溴的酸消解法，电感耦合的等离子体光吸收法测定锑的方法。基于我们的测量结果，每种分析技术计算出了不同的统计参数，这表明EDXRFS具有已成功地用于测定Br-HIPS和Br-ABS热解油中的溴和锑浓度。确实发生了由基质效应引起的误差，特别是在样品的氮含量与通过EDXRFS和其他方法（离子色谱法和ICP-OES）测得的溴和锑的差异之间发现了相关性。但是，发现这些差异在统计学上不显着，因此可以得出结论，EDXRFS是分析热解油中溴和锑含量的合适技术。

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