Spectrophotometric determination of molybdenum with gallein and cetyltrimethylammonium bromide

Abstract

A ternary complex system between molybdenum, gallein and cetyltrimethylammonium bromide is proposed for the determination of microgram amounts of molybdenum. The complex has an absorbance maximum at 618 nm. The sensitivity of the reaction is 0·0026 µg cm^–2 of molybdenum for log [graphic omitted] = 0·001. The development of this method for the determination of molybdenum included a study of the effect of pH, temperature, reagent concentration, rate of complex formation and conformity to Beer's law.