【摘要】 本文利用Cu²⁺与荧光素汞—硫络合物中硫反应,从而释放出荧光素汞,使荧光强度增加的原理,提出了测定铜的荧光光度法。实验表明,0.1MNaOH中,无水乙醇增敏作用下,Cu²⁺在10×10^-6—1.0×10^-9M范围内与荧光强度有良好的线性关系。最低检测限为2×10^-10M,该方法操作简便,灵敏度高,用多点增量标准加入法测定地质矿样中的铜,结果令人满意。更多还原

【Abstract】 In present paper,an indirect lluorimetric method for the determination of trace copper,based oa the reaction with iluoresceinmercuric sulfide enhancing fluorescence in 0.1M sodium hydroxide solution was studied. Test showed that alcohol can enhance the fluorescence of the system. The fluorescence intensity is measured at 520 nm with a excited wavelength 499nm, it is a linear function of the concentration in the range of 1.0×10-3-1.0×10-9M for cooper. The detection limit is 1.3×10-8g/1(13ppt) This method has been used for the determination of copper in a real sample and water with satisfactory results.更多还原