响应面优化超声提取-原子吸收光谱法测定人发中铅的含量

发布时间：2018-11-17 08:36

【摘要】：在单因素试验基础上,通过Plackett-Burman试验筛选及中心组合设计试验优化超声时间、超声温度和混酸用量三个因素对超声辅助提取人发中铅的影响。由响应面法建立二次回归模型得到最佳超声条件为:超声时间16 min,超声温度56℃,混酸体积6.50 m L。方法的相对标准偏差(RSD)为3.18%。检出限为0.80μg·L~(-1),定量限为2.7μg·L~(-1)。t检验结果表明超声提取法和湿消解法之间无显著性差异,因此用超声波辅助-原子吸收光谱法测定人发中的铅方法可行,且超声提取法耗时短、试剂用量少。
[Abstract]:On the basis of single factor test, the effects of ultrasonic time, ultrasonic temperature and the amount of mixed acid on ultrasonic assisted extraction of lead in human hair were optimized by Plackett-Burman test and central combination design test. The optimum ultrasonic conditions are as follows: ultrasonic time is 16 min, ultrasonic temperature is 56 鈩，

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