摘要
要采用萃取-紫外吸收光谱法,测定微晶蜡中微量3,4-苯并芘的含量 选择二甲亚砜作为萃取溶剂,绘制工作曲线 结果表明,3,4-苯并芘含量在50～3000ng/g的范围内,成良好的线性关系,相关系数为0.9995,检出限为16ng/g 方法重复性好,相对标准偏差为6.2%,回收率在97.0%～99.
Solvent extraction and UV absorbing method were adopted to determine 3,4- benzopyrene content in microstalline wax. Dimethyl sulfoxide was used as extraction solvent. Hexadecane as blank solvent was selected for making a series of standard solutions. The standard curve was made by the UV absorbance and the 3,4- benzopyrene.The results show that the good liner relation is between 50 ng/g and 3 000 ng/g and the correlation coefficient is 0.9995. Detection limit is 16 ng/g. This method gives an accurate and precise result with the RSD less than 6.2 %. The recovery is between 97.0 %～99.4 %.
出处
《分析测试技术与仪器》
CAS
2003年第3期169-172,共4页
Analysis and Testing Technology and Instruments
基金
中国科学院"百人计划"项目资助
