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DETERMINATION OF BORON IN FOODSTUFFS BY FLOW INJECTION SPECTROPHOTOMETRY

A new method for determination of boron in foodstuffs by flow injection analysis is described, which is based on the coloration of boron and 3-methoxy-azomethine-H in an acid medium. The calibration graph is linear in range of 0.033 mg/L-5 mg/L B(Ⅲ). A detection limit of 0.033 mg/L is achieved at a sampling frequency of 28 samples/h.The relative standard deviation is 0.54 % for the determination of 3 mg/L B(Ⅲ) (n=11).This method is simple, fast, sensitive and accurate. The proposed method has been applied to the analyses of several foodstuffs with satisfactory results.