萃取-紫外分光光度法测定微晶蜡中3, 4-苯并芘含量

The Determination of 3, 4-Benzopyrene Content in Microstalline Wax with the Solvent Extraction and UV Absorption Method

中文关键词:  3,4-苯并芘  微晶蜡  紫外吸收光谱  萃取

英文关键词:3,4-benzopyren  microstalline wax  UV absorption spectrum  extraction

中文摘要:

      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%～99.4%之间.

英文摘要:

      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%.