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本文报导钒酸离子在溴酸钾和没食子酸的酸性溶液中,以测定钒的催化分光光度法。当测定波长为440毫微米时,钒量由0.8～5毫微克/毫升和A-t直线的斜率成直线关系。测定的最佳条件为取不同量的钒酸离子,1.0％没食子酸溶液4毫升和水10毫升,调整其pH值约为3,加入缓冲溶液(pH=3.02)5毫升,4％溴酸钾2毫升,再稀释成25.00毫升。研究了酸度、杂质离子等对测定的影响,以及应用于水、尿、指甲中含钒量的测定。
This paper reports the catalytic spectrophotometric determination of vanadium in vanadium acid in acidic solutions of potassium bromate and gallic acid. When the measurement wavelength is 440 nm, the vanadium content is linearly related to the slope of the A-t line from 0.8 to 5 ng / ml. The optimum conditions for the determination of different amount of vanadate ions, 1.0% gallic acid solution 4 ml and water 10 ml, adjusting its pH value of about 3, adding buffer solution (pH = 3.02) 5 ml, 4% potassium bromate 2 ml , And then diluted to 25.00 ml. The effects of acidity and impurity ions on the determination were studied. The determination of vanadium content in water, urine and nails was also studied.