摘要
采用二苯碳酰二肼分光光度法测定鸡饲料中微量铬(Ⅵ)。经试验确定最佳试验条件为:1∶1磷酸0.5mL,1∶1硫酸0.3mL,波长为540nm。铬的含量在0.008~0.4μg·mL-1范围内与吸光度A呈良好的线性关系,标准工作曲线为y=0.0112x+0.019,相关系数为r=0.9996。加标回收率为99.59%~101.12%。此方法操作简单,测定快速,测定结果的准确度和精密度较高。
Using biphenyl earbonyl 2 hydrazine spectrophotometer method determination of trace chromium in feed. Through experiment to determine the best conditions for: 1 : 1 phosphoric acid 0.5 ml, 1 : 1 sulfuric acid 0.3 ml, wavelength of 540 nm . At the content of chromium range in 0.008 - 0.4μg·mL- 1 ,between content andA values showed a good linear relationship, This experiment standard working curve for y = 0.0112 + 0.019 x, the correlation eoefficiem ofr = 0.9996. Standard addition recovery rate was 99.59% - 101.12%. This method is simple, rapid, high accuracy and precision of testing results.
出处
《上饶师范学院学报》
2014年第3期48-52,共5页
Journal of Shangrao Normal University
基金
2013年江西省高校省级教改立项项目(项目编号:JXJG-13-16-5)
关键词
二苯碳酰二肼分光光度法
鸡饲料
微量铬(Ⅵ)
1,5 - Diphenylcarbazide Spectrophotometry
chicken feed
trace chromium( Ⅵ )