SVHC第23批新增4项物质测试方法研究

Research on the Detection of Four New Substances in the 23 Batch of SVHC

本文建立了同时测定欧盟高关注物质(SVHC)第23批新增的4种物质[1-乙烯基咪唑、-甲基咪唑、4-羟基苯甲酸丁酯、双(乙酰丙酮酸)二丁基锡的气相色谱质谱联用仪(GC-MS)]的检测方法。将样品用二氯甲烷超声后,采用选择离子监控模式(SIM)进行分析样品中的待测物。实验结果表明,4种物质在50 mg/L范围内线性关系良好,线性相关系数为0.995以上;样品加标回收率为94%110%,相对标准偏差(RSD)小于7%;方法检出限分别为2 mg/kg、10mg/kg、0.8 mg/kg、0.6 mg/kg,解决了欧盟新增加的4种SVHC测试问题。

A detection method with GC-MS was established to detect all of the four new substances among the 23 rd batch of EU’s SVHCs,namely 1-vinylimidazole,2-methylimidazole,butyl 4-hydroxybenzoate and dibutylbis(pentane-2,4-dionato-O,O’)tin.Having undergone ultrasonic wave-assisted extraction with dichloromethane,the sample was then analyzed by GC-MS with selected ion monitor(SIM).Results showed that the four substances linearities were good in 0-50 mg/L with this method,and the correlation coefficient remained more than 0.995.The sample recovery was 94%110%and relative standard deviation(RSD)was less than 7%.The method detection limits(MDL)of the four substances are 2 mg/kg,10 mg/kg,0.8 mg/kg and 0.6 mg/kg respectively.Thus this method can solve the testing problems of the four substances.