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几种镉快速测定方法在稻谷样品测定中的应用研究
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Study on the application of rapid determinations of cadmium in paddy
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    选用X射线荧光光谱法(1和2)、快速提取法和阳极溶出伏安法3种镉快速测定方法和GB/T 5009.15—2003《镉标准测定方法》,测定58个稻谷样品中的镉含量,通过对标准测定方法与快速测定方法测定结果进行比较,结果表明:3种快速测定方法测定结果定性判定正确率在79.3%~87.9%,检测结果在0.16~0.24 mg/kg范围内,定性判定正确率在52.4%~79.2%,检测结果在<0.16 mg/kg或>0.24 mg/kg范围内,定性判定正确率在90.5%~94.6%;定量判定符合率在48.3%~65.5%,检测结果在≤0.2 mg/kg范围内,定量判定符合率在28.6%~85.0%,检测结果在>0.2 mg/kg范围内,定量判定符合率在52.6%~78.3%;4个回归方程分别为Y=1.041 5X-0.013 1、Y=0.738 3X+0.026 3、 Y=0.982 8X+0.034 2和 Y=1.069 7X-0.000 4,R2分别为0.813 8、0.642 6、0.821 1和0.823 7。

    Abstract:

    Cadmium content in paddy was determined by three rapid methods, including X-ray fluorescence spectrometry, rapid extraction method and anodic stripping voltammetry, and GB/T 5009.15-2003 standard determination method of cadmium, the samples included 58 species of paddy. The result obtained by standard determination method was compared with that by three rapid methods. The qualitative result showed that the accuracy of the three methods reached 79.3%~87.9%. For the testing result which was in the range of 0.16 mg/kg~0.24 mg/kg, its accuracy was between 52.4%~79.2%, otherwise, the accuracy was between 90.5%~94.6%. Whereas, the coincidence rate of quantitative result was 48.3%~65.5%. For the testing result which was lower than or equal to 0.2 mg/kg (≤0.2 mg/kg), its coincidence rate was between 28.6%~85.0%, otherwise, the coincidence rate was between 52.6%~78.3%. Four regression equations were obtained respectively: Y=1.041 5X-0.0131(R2=0.813 8), Y=0.738 3X+0.026 3(R2=0.642 6),Y=0.982 8X+0.034 2(R2=0.821 1)and Y=1.069 7X-0.000 4(R2=0.823 7), with R2 were 0.813 8, 0.642 6, 0.821 1 and 0.823 7, respectively.

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骆倩,赵美凤,宁晖,杜京霖,杜文凯,应美蓉,高梦莎.几种镉快速测定方法在稻谷样品测定中的应用研究[J].粮油食品科技,2015,23(6):80-83.

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  • 在线发布日期: 2015-12-08
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