摘要
目的应用氢化物发生-原子荧光分析技术测定食品中总无机砷、三价砷[As3+]和五价砷[As5+].方法6 mol/LHCl提取食品中无机砷,在2 mol/L HCl条件下测定总无机砷,再利用在强酸条件下,甲苯可以定量将无机砷中As3+萃取到有机相中从而达到分离As3+和As5+,最后分别测定不同价态的砷.结果经过多次实验,该方法样品回收率:无机砷为85%～105%,三价砷为85%～110%,五价砷为90%～110%;样品的相对标准偏差:三价砷为7.56%,无机砷为5.53%.结论此法可以满足各类食品的无机砷的测定及价态分析,并且分析快速、灵敏度高、干扰少.
Objective This study was by using the Hydride Generation-Atomic fluoresence spectromery to determine the inorganic arsenic,As~ 3+ and As~ 5+ in the food. Methods 6 mol/L HC1 was drawn the inorganic arsenic from the food,and it was analyzed under 2 mol/L HC1 condition.In order to determine the different valence of Arsenic,we used the toluene to extract the As~ 3+ from inorganic arsenic into it. Results The recovery of this method was inoranic arsenic:85%～105%,As~ 3+:85%～110%,As~ 5+:90%～110%;the RSD of this method was As~ 3+:7.65%,inorganic arsenic:5.53%. Conclusion This method has a high detective sensitivity,little interfere,and improved the analyze speed.
出处
《中国预防医学杂志》
CAS
2005年第3期206-208,共3页
Chinese Preventive Medicine
