摘要
A highly sensitive spectrophotometric method for determination of selenium(IV) has been developed.It has been based on Se(IV) oxidation of I - in a weak acid medium and formation of the 1∶1 ion associatin complex of I - with Butylrhodamine B in the presence of poly(vinyl alcohol).The wavelength of maximum absorbance of this complex was at 590nm,The molar absorptivity was 2.57 ×10 5L.mol -1 ·cm -1 and Beer’s law was obeyed in the concentration range of 40～500ng/mL.The detection limit was 40ng/mL.Interfering ions were eliminated by using thiohydroxy cotton so that the selectivity of this method was good.The color system was used to determine the microamounts of Se in the liver of dophine and huangqi.Satisfactory results were obtained.
A highly sensitive spectrophotometric method for determination of selenium(IV) has been developed.It has been based on Se(IV) oxidation of I - in a weak acid medium and formation of the 1∶1 ion associatin complex of I - with Butylrhodamine B in the presence of poly(vinyl alcohol).The wavelength of maximum absorbance of this complex was at 590nm,The molar absorptivity was 2.57 ×10 5L.mol -1 ·cm -1 and Beer’s law was obeyed in the concentration range of 40～500ng/mL.The detection limit was 40ng/mL.Interfering ions were eliminated by using thiohydroxy cotton so that the selectivity of this method was good.The color system was used to determine the microamounts of Se in the liver of dophine and huangqi.Satisfactory results were obtained.
出处
《四川大学学报（自然科学版）》
CAS
CSCD
北大核心
2000年第2期288-292,共5页
Journal of Sichuan University(Natural Science Edition)
基金
国家自然科学基金!( 2 98770 1 8)
