Ali Q. Jameel
The new method is rapid, simple, and sensitive for the determination of Hydronium ion in strong acids using 532nm solid state laser diode withcontinuous flow injection analysis and using laser dye (Rhodamine6G) as a fluorescent host .The method was based onthe fluorescence of Rhodamine6G and quenching effect of fluorescence by strong acid in aqueous medium.. A liner range of strong acid was 7-2000mMol.L-1for H2SO4,7-1000mMol.L-1for HNO3 and 10-2000mMol.L-1for HCl,with correlation coefficient r= 0.9750, 0.9791 and 0.9891 ,successively the limit of detection was (LOD) 270.108, 144.608 and 150.616μg/sample based on gradual dilution of lowest concentration in calibration graph. Which are most commonly used strong acids, in various aspects of modern life. Chemical and physical parameters of this system were investigated. The method can be regarded as a unique way of determining acids.