FOOD SCIENCE ›› 2010, Vol. 31 ›› Issue (22): 407-410.doi: 10.7506/spkx1002-6630-201022090

• Analysis & Detection • Previous Articles     Next Articles

Determination of Aluminum in Flour Food by Microemulsion Sensitization-Spectrophotometry

ZHOU Ju-feng1,XIE Hong1,PENG Ai-jiao2,ZHANG Hui1   

  1. 1. Department of Chemistry and Life Sciences, Xiangnan University, Chenzhou 423000, China;
    2. Library of Xiangnan University, Chenzhou 423000, China
  • Received:2010-02-01 Online:2010-11-25 Published:2010-12-29
  • Contact: ZHOU Ju-feng E-mail:hnsd333@126.com

Abstract:

Objective: To determine the content of aluminum in flour with spectrophotometry in microemulsion medium. Methods: Samples were dissolved using an intelligent electronic digestion system in microemulsion medium composed of PVA, n-butanol, n-heptanol and water in acetic acid-sodium acetate buffer system. The chromogenic agent was chrome azurol S (CAS) and the absorbance has a direct proportion to the concentration of aluminum in solution. Results: Standard curve revealed an excellent linearity within the range of 0.0-6.0 μg/25 mL with a correlation coefficient of 0.9971. The recovery rates of spiked samples were 95%-108%. Conclusion: This method is simple, sensitive and stable, and it can be used to determine the content of aluminum in flour.

Key words: intelligent digestion system, microemulsion, chrome azurol S, spectrophotometry, flour products, aluminum

CLC Number: