Development of Nano-Fe2O3-modified Potentiometric Sensor for Ascorbic Acid

doi:10.7506/spkx1002-6630-201106071

FOOD SCIENCE ›› 2011, Vol. 32 ›› Issue (6 ): 311-313.doi: 10.7506/spkx1002-6630-201106071

• Technology Application • Previous Articles Next Articles

Development of Nano-Fe2O3-modified Potentiometric Sensor for Ascorbic Acid

LIU Fang1，GUO Zhi-hui2，ZHENG Xing-wang2

1. Department of Bio-chemistry, Wenshan University, Wenshan 663000, China；
2. College of Chemistry and Materials Science, Shaanxi Normal University, Xi’an 710062, China

Received:2010-05-27 Revised:2011-01-21 Online:2011-03-25 Published:2011-03-03
Contact: LIU Fang E-mail:lflyd7125315@126.com

Abstract

Abstract: Nano-Fe2O3-modified graphite electrode was prepared and used as a new potentiometric sensor for the detection of ascorbic acid. The properties, determination conditions and factors of this potentiometric sensor were explored. Results indicated that the linear range of this sensor in phosphate buffer solution with pH 6.5 ranged from 1.0 × 10-6 to 1.0 × 10-3 mol/L (r = －0.9969) with－30.2 mV/pC slope and 8.9 × 10-7 mol/L detection limit. This sensor has been used for determining ascorbic acid in orange juice and vitamin C tablets with satisfactory results.

Key words: Nano-Fe2O3, modified electrode, potentiometric sensor, ascorbic acid

CLC Number:

O657.1

LIU Fang1，GUO Zhi-hui2，ZHENG Xing-wang2. Development of Nano-Fe2O3-modified Potentiometric Sensor for Ascorbic Acid[J]. FOOD SCIENCE, 2011, 32(6 ): 311-313.

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Development of Nano-Fe2O3-modified Potentiometric Sensor for Ascorbic Acid

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