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《Chinese Journal of Analytical Chemistry》 1992-08
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Photochemical Fluorimetric Method——Ⅶ. Simultaneous Determination of Vitamin B_1 and Vitamin B_6

Guo Xiangqun~*; Xu Jingou; Wang Jinling; Chen Guozhen(Department of Chemistry, Xiamen University, Xiamen 361005)  
A new method for simultaneous determinatien of vitamin B_1 and B_6 by photochemical kinetie (time-election and wavelength-election)fluorimetry is presented. It is based on the photochemical reaction of vitavnin B_1 and B_6 in NaOH medium with an increase in the fluorescence intensity of B_1 and a decrease in the fluorescence intensity of B_6. The prineiple of method is discussed. Linear eaiibraticn eurves are obtained over the range of 0~1.4 and 0~2.0μg/ml for vitamin B_1 and B_6, respectivety (r=0.999 for both). The limits of determination were 0.60 ng/ml Ba_1 and 1.0ng/ml B_6(time-eloetibn)or 2.0 ng/ml B_6 (wavelength-election). The relative standard deviations of determination for B_1 and B_6 were 0.99%(n=8) and 2.3% (n=8), respectively. This method has been applied to the determination of mixture of vitamin B_1 and B_6 with satisfactory results
【Fund】: 国家自然科学基金
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