Determination of Trace zinc by Fluorescence Spectrophotometry with Bis-sulfosalophen

A new schiff's base bis-sulfosalophen has been synthesized by Sodium salicylaldimine-5-sulphonate with 3,3',4,4'-Biphenyltetramine. Zonic ion can coordinate with the compound and enhance its fluorescence intensity. Thereby, a new spectrofluorimetric method for the determination of trace zonic has been developed. When the concentration of zonic is in the range of 1 similar to 7 mu g/mL, it has a good linear relationship with F, where the regression equation and the correlation coefficient are F=205.7+282.6c(Zn)(mu g/mL) and r=0.9935 respectively. The detection limit for zonic has been found to be 1.72ng/mL. The method has been used to determine trace zonic in river, city and mineral water samples with the relative standard deviation of 0.23 similar to 3.84%(n=5), the recovery of 101.7 similar to 105.0%.