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建立了热解析-裂解-气相色谱/质谱法测定电子电气中多溴二苯醚(PBDEs)的方法。采用气相色谱-质谱总离子流和选择离子流对PBDEs进行定性和定量测定。对热解析温度,热解析时间,热解析升温速率和附件初始温度进行了优化,并进行了线性关系、精密度等试验。本方法线性范围200~1000 mg/kg,相关系数为0.995,检出限为50 mg/kg,相对标准偏差小于15%。本方法可直接固体进样,简化了前处理步骤,适用于电子电气产品中PBDEs的测定,满足欧盟Ro HS指令限量的检测要求。
A method for the determination of polybrominated diphenyl ethers (PBDEs) in electronic and electrical appliances was established by thermal analysis-pyrolysis-gas chromatography-mass spectrometry. PBDEs were qualitatively and quantitatively determined by gas chromatography-mass spectrometry total ion current and selective ion current. The thermal analysis temperature, thermal analysis time, thermal analysis heating rate and initial temperature of accessories were optimized, and the linear relationship, precision and other tests were carried out. The linear range of this method was 200-1000 mg / kg, the correlation coefficient was 0.995, the detection limit was 50 mg / kg and the relative standard deviation was less than 15%. This method can be directly solid sample, simplifying the pre-treatment steps for the determination of PBDEs in electrical and electronic products to meet the EU Ro HS directive limits the detection requirements.