Citation: Hui CHANG, Jian Nan YANG. FLOW INJECTION SPECTROPHOTOMETRIC DETERMINATION OF VITAMIN B1 AND VITAMIN B2 IN MULTIVITAMIN[J]. Chinese Chemical Letters, ;1995, 6(8): 705-706.
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Vitamin B1 reacts with diazo-aminobenzene sulfonic acid to form a red complex in a basic medium and there is absorption of vitamin B2 at 440 nm.A flow injection spectrophotometric determination of the two medicaments is described based on these characteristics.The method was simple and had a high selectivity and sampling rate of 60 h-1 The dynamic linear ranges were 0-100μg ml-1 of vitamin B1 and 0-80μg ml-1 of vitamin B2, respectively.The relative standard deviation was 0.2881% (n=10) for vitamin B1.
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