[Study on fluorimetry of aluminum quaternary complex and analytical application]

This study was conducted to seek an easy-to-do method for determination of aluminum in biological and food samples. The fluorescent reaction of aluminum forming quaternary complex with fluoride, Ferron and CTMAB in the buffer solution of ammonium acetate (at pH 6.0) was investigated. The conditions of the reaction and the pretreatment of samples were optimized. In addition, the aluminum contents of hair and food samples was detected. A good linear relationship between fluorescence intensity and aluminum concentrations from 0.002 microgram/ml to 0.20 microgram/ml was observed. The detection limit was 1.0 x 10(-3) micrograms/ml. The spiked recoveries were in the range of 88.66%-112.61% with relative standard deviation varying from 1.87% to 2.56%. This method has characters of good sensitivity, selectivity and the ability against interference, it can be of wide application.