LEVELS OF SOME MAJOR AND TRACE-ELEMENTS IN COMMERCIAL MANGO FRUIT JUICES DETERMINED BY FLAME ATOMIC-ABSORPTION SPECTROMETRY

A simple and low cost method has been described for the determination of Na, K, Ca, Cr, Fe and Zn in mango fruit juices using atomic absorpt ion spectrometry. The method involves digestion of samples with nitric acid at 105 degrees C on an oil bath for 45 minutes. Relative standar d deviation for major elements was better than 1% and for trace elemen ts around 7%. The concentration ranges for Na, K, Ca, Cr, Fe and Zn ar e 81-300, 49-570, 36-181, 0.075-0.250, 0.80 -2.03 and 0.05-0.70 mu g/g respectively.