A new method for determination of Nickel using 2-(8 -hydroxy quinolino-5-sulfoacid-7-azo)-1,8-dihydroxy-3,6-naphthalene disulfoacid is set u p. In pH9.37 B-R media ,Nickel and 8Q5SAC react to form a 1∶3 complex, and ...A new method for determination of Nickel using 2-(8 -hydroxy quinolino-5-sulfoacid-7-azo)-1,8-dihydroxy-3,6-naphthalene disulfoacid is set u p. In pH9.37 B-R media ,Nickel and 8Q5SAC react to form a 1∶3 complex, and surface active agen t CTMAB has effect of increasing sensitivity. The maximum absorbance of the reagent is 692 nm, th e complex is 542 nm, and the apparent molar absorptivity is 6 0×10 4L·mol -1 ·cm -1 , by using dual wavelength increasing sensitivity method. Beer’s law is obeyed by in 0～20 μg/25 mL for Nickel. The sensitivity increased by 2 5 times in contrast with using single w alvelength. The method is applied to the determination of Nickel in actual sampl es with satisfactory results.展开更多
基金The work was supported bythe National High Technology Development Project(2001AA624030),the Natural Science Foundation of Guangdong Province(04300569),and the Youth Teacher Foundation of Sun Yat-Sen University(1131002).
文摘A new method for determination of Nickel using 2-(8 -hydroxy quinolino-5-sulfoacid-7-azo)-1,8-dihydroxy-3,6-naphthalene disulfoacid is set u p. In pH9.37 B-R media ,Nickel and 8Q5SAC react to form a 1∶3 complex, and surface active agen t CTMAB has effect of increasing sensitivity. The maximum absorbance of the reagent is 692 nm, th e complex is 542 nm, and the apparent molar absorptivity is 6 0×10 4L·mol -1 ·cm -1 , by using dual wavelength increasing sensitivity method. Beer’s law is obeyed by in 0～20 μg/25 mL for Nickel. The sensitivity increased by 2 5 times in contrast with using single w alvelength. The method is applied to the determination of Nickel in actual sampl es with satisfactory results.
