A Voltammetric Sensor for Simultaneous Determination of Vitamin C and Vitamin B-6 in Food Samples Using ZrO2 Nanoparticle/Ionic Liquids Carbon Paste Electrode

作者：Baghizadeh, Amin; Karimi-Maleh, Hassan^*; Khoshnama, Zahra; Hassankhani, Asadollah; Abbasghorbani, Maryam

来源：Food Analytical Methods, 2015, 8(3): 549-557.

DOI：10.1007/s12161-014-9926-3

• Vitamin C
• Vitamin B-6
• Food sample analysis
• ZrO2 nanoparticles
• Ionic liquid

A fast and simple voltammetric method based on the use of ZrO2 nanoparticle/ionic liquids carbon paste electrode (ZrO2/NPs/IL/CPE) is proposed for the determination of vitamin C (ascorbic acid (AA)) in the presence of vitamin B-6. In the first step, we describe synthesis and characterization of ZrO2 nanoparticles (ZrO2/NPs) with different methods such as transmission electron microscopy (TEM) and X-ray diffraction (XRD). In the second step, application of the synthesis nanoparticles describes for the preparation of carbon paste electrode modified with 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim]BF4) as a binder for voltammetric determination of AA and vitamin B-6 in food samples. At an optimum condition (pH 7.0), the two peaks are separated ca. 0.44 and 0.82 V for AA and vitamin B-6. This point shows that AA can be determined in the presence of vitamin B-6 and more than 3.75 times current excess of AA. The peaks current of square wave voltammograms (SWV) of AA and vitamin B-6 increased linearly with their concentration in the ranges of 0.07-850 mu M AA and 0.8-550 mu M vitamin B-6. The detection limits for AA and vitamin B-6 were 0.009 and 0.1 mu M, respectively. The modified electrode has been successfully applied for the assay of AA and vitamin B-6 in food samples such as tablet, urine, fruit juice, and injection in comparison with other method. The obtained data was check with F and t tests.

• 出版日期2015-3