粮油食品科技英文版
1007-7561
2016
24
4
64
70
article
X射线荧光光谱法测定稻谷中镉、铅和无机砷
Determination of cadmium, lead and inorganic arsenic in rice by X-ray fluorescence spectrometer
选用3种型号X射线荧光光谱仪，测定稻谷样品中的镉、铅和总砷含量，并分别与GB/T 5009.15—2003镉、GB/T 5009.12—2003铅和GB/T 5009.11—2003无机砷标准方法测定结果进行比较。67个稻谷样品镉测定结果比较表明，两者的相关系数分别为0.9711、0.8509和0.9729，均呈极显著相关，回归方程分别为Y=0.8495X+0.0621、Y=0.6197X+0.0493和Y=0.872X+0.0064；定性判定正确率为65.7%～91.0%，检测结果在0.16mg/kg≤0≤0.24mg/kg范围内，定性判定正确率在38.1%～81.0%，检测结果在＜0.16mg/kg或＞0.24mg/kg范围内，定性判定正确率在78.3%～95.7%；定量判定符合率在19.4%～44.8%，检测结果在≤0.2mg/kg范围内，定量判定符合率在17.6%～37.3%，检测结果在＞0.2mg/kg范围内，定量判定符合率在25.0%～68.8%。通过对33个稻谷样品测定铅的结果和对60个稻谷样品测定总砷与无机砷的结果比较，测定结果之间不存在相关性。
The contents of cadmium, lead and total arsenic in rice were determined by three types of X-ray fluorescence spectrometer and were compared with determination of cadmium by national standard GB/T 5009.15-2003, determination of lead by national standard GB/T 5009.12-2003 and determination of inorganic arsenic by national standard GB/T 5009.11-2003. The results of 67 samples showed that three regression equations were Y=0.8495X+0.0621,Y=0.6197X+0.0493 and Y=0.872X+0.0064, with correlation coefficient 0.9711,0.8509 and 0.9729, respectively, which showed a very significant correlation. The qualitative judgment correct rate reached 65.7%～91.0%. For the testing result which was in the range of 0.16mg/kg～0.24mg/kg, the qualitative judgment correct rate was 38.1%～81.0%, out of the range the qualitative judgment correct rate was 78.3%～95.7%. The quantitative judgment coincidence rate reached19.4%～44.8%. For testing result which was lower than or equal to 0.2mg/kg (≤0.2mg/kg)，its coincidence rate was 17.6%～37.3%, otherwise, the coincidence rate was 25.0%～68.8%.
镉、铅、总砷和无机砷；快速测定；稻谷样品；应用研究
cadmium; lead; total arsenic and inorganic arsenic; rapid determination; rice sample; application
骆 倩,张谷平,赵美凤,宁 晖,房 芳,杜文凯,高梦莎
lyspkjen/article/abstract/20160415