全自动测汞仪方法的确立.docVIP

学校代码 10126 学 分 类 号___________ 密级_________ 本科毕业设计 (全自动测汞仪方法的确立) 学院、系: 内蒙古大学鄂尔多斯学院 专业名称: 材料化学 年 级: 11级 学生姓名: 冀帆 指导教师: 田福利老师 2015年5月15日按照 G B/T 5009.17-2003《食品中总汞的测定》方法，对于Hydra-C全自动测汞仪方法的确立：热解温度对实验方法的影响采用土样标准物测定曲线，确定线性方程检出（SD为标准偏差，B为线性斜率）精密度的计算样品加标回收率的测定（包括：奶粉，牛奶）。结果表明：本方法线性范围: 0.28~10.12 ng，绘制得标准曲线为y = 17633x + 2440.3，相关系数r20.9967。检出限为ng，加标回收率为10.77% ~ 114.47%，相对标准偏差( RSD)位于0.4% ~ 4%之间，在5. 0%范围内。测定由中国计量科学研究院生产的标准参考物质GBW10018鸡肉，其测定值均在标准值范围内关键词： 汞全自动方法确定 The establishment of automatic mercury meter method JiFan TianFuli Abstract In according to GB/T 5009.17-2003 determination of total mercury in food.The method of “HydraⅡ-C”what was called test of the mercury use automatic method. The experimental determination of the influence of pyrolysis temperature on the experiment, the soil sample standard substance determination standard curve, determine the linear equation, the determination of the detection limit of this method, (need parameters including SD for blank standard deviation, B for linear slope) the precision of calculation, the sample standard addition recovery rate determination (including: milk powder, milk).The results?show that: the range of linear is?: 0.28 ~ 10.12ng,?linear regression equation : y = 17633x + 2440.3,correlation coefficient r2= 0.9967,the detection limit is 0.015ng,the recovery rate is?108.77% ~ 114.47%.the relative standard deviation?(RSD)?between 0.4%?~4.6%.in the range of 5%.As determined by the production of Chinese Institute of metrology standard reference material GBW10018 chicken , the measurements are within the scope of the standard value. Established the method. Keywords: Mercury , Fully automa