SCIENCE AND TECHNOLOGY OF CEREALS, OILS AND FOODS

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Determination of cadmium, lead and inorganic arsenic in rice by X-ray fluorescence spectrometer
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    Abstract:

    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%.

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  • Received:
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  • Online: July 28,2016
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