儿童胶画颜料中邻苯二甲酸酯类化合物检测前处理方法的研究

考察了12种不同种类的溶剂对儿童胶画颜料中邻苯二甲酸酯类化合物萃取效率的影响,发现乙酸乙酯作为溶剂时,萃取效率最高.比较了微波萃取、索氏提取、超声萃取、快速溶剂萃取这4种前处理方法对萃取效率的影响,发现微波萃取效率最高.进一步优化了微波萃取的方法,萃取效率随着微波萃取温度的升高而提高.但是,当萃取温度从100 ℃提高到120℃时,萃取结果增加不明显,说明在100℃时,萃取已经相对完全.该前处理方法简单快速、提取效率高、使用的试剂毒性小、对环境友好,能够满足儿童胶画颜料中邻苯二甲酸酯类化合物的检测要求.

Pre-treatment Methods of Determination of Phthalte Acid Esters from Children Tempera Painting Pigments

Compared the effect of 12 different kinds of solvents on the extraction efficiency of phthalic acid esters from children tempera painting pigments.The highest extraction efficiency was observed by using ethyl acetate as solvent.Also compared the different pre-treatment ways,there are microwave extraction,Soxhlet extraction,ultrasonic extraction and fast solvent extraction.The results showed that the extraction efficiency was higher by using microwave extraction than other three extraction ways.The microwave extraction method has been optimized.With the increase of extraction temperature,the extraction efficiency improved.However,when the extraction temperature increased from 100 ℃ to 120 ℃,the extraction efficiency improved not obviously.So,the extraction relatively completed at 100 ℃.The pre-treatment method observed in this work is simple and quick.Also,the extraction efficiency is high.Moreover,the solvent selected in this method is low toxicity and environmentally friendly.This pre-treatment method is quiet suitable for the determination of phthalic acid esters from children tempera painting pigments.