Determination of Calcium in Milk Power by Energy Dispersive X-Ray Fluorescence Spectrometry

doi:10.7506/spkx1002-6630-201324053

Abstract

Abstract:

Objective: To explore a simple method for the determination of calcium in milk power. Methods: Samples
were prepared by a pressing method without acid digestion. Each sample was detected for 160 s by energy dispersive X-ray
fluorescence spectrometry. This paper explored the best working conditions of the machine. Results: A standard curve was
established. The calibrated equation was y = 2.2769x － 0.2771 with liner correlation coefficient of 0.9988. The accuracy
and precision of the method was analyzed, and the measured values were accorded with those from flame atomic absorption
method that is the standard method in our country. The recoveries were in the range of 97%-105% with relative standard
deviation of less than 5%. Conclusion: The energy dispersive X-ray fluorescence spectrometry method can directly detect
solid samples when compared with other methods. This method has the advantages of no emission of toxic gas during the
experiment, labor-saving operation and less consumption of materials and time . It can be used as a convenient, rapid and
effective way to test the content of calcium in milk powder.

Key words: energy dispersive X-ray fluorescence spectrometry, calcium, milk power, determination

CLC Number:

TS252.7

WANG Dong-qi，JIANG Zhan-mei，TIAN Ran，TIAN Bo. Determination of Calcium in Milk Power by Energy Dispersive X-Ray Fluorescence Spectrometry[J]. FOOD SCIENCE, 2013, 34(24): 254-257.

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