Determination of Zn in Food by Nanometer TiO2 Separation and Concentration -Atomic Absorption Spectroscopy

doi:10.7506/spkx1002-6630-200906050

FOOD SCIENCE ›› 2009, Vol. 30 ›› Issue (6): 219-221.doi: 10.7506/spkx1002-6630-200906050

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Determination of Zn in Food by Nanometer TiO2 Separation and Concentration -Atomic Absorption Spectroscopy

LIU Hui，YANG Chun

(College of Food Engineering，Xuzhou Institute of Technology, Xuzhou 221008, China)

Received:2008-05-10 Revised:2008-07-01 Online:2009-03-15 Published:2010-12-29
Contact: LIU Hui， E-mail:lhljflst@126.com

Abstract

Abstract:

In this study, the adsorption and desorption behaviors of nanometer TiO2 to Zn were investigated. It was found hat nanometer TiO2 has good and rapid adsorption capacity to Zn in the range of pH 9 to 11. Under the optimized experimental onditions, the static adsorption capacity of nanometer TiO2 is 15.9 mg/g. 95% Zn can be desorbed by 0.5 mol/L HNO3, and the oncentration multiple of Zn is 75. The detection limit (3σ) of Zn by atomic absorption spectroscopy is 20.15 ng/L, and the RSD f this method is 3.5% (n=10) at 10 μg/ml of Zn. The spike recoveries of Zn in tap water, pork, crucian meat, burdock and tomato re in the range of 92.5% to 105.0%.

Key words: zinc, anometer TiO2, atomic absorption spectroscopy, separation and concentration

CLC Number:

TS207.3

LIU Hui，YANG Chun. Determination of Zn in Food by Nanometer TiO2 Separation and Concentration -Atomic Absorption Spectroscopy[J]. FOOD SCIENCE, 2009, 30(6): 219-221.

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Determination of Zn in Food by Nanometer TiO2 Separation and Concentration -Atomic Absorption Spectroscopy

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