摘要
It is found that in the medium of H2SO4,the fading reaction of Beryllium Ⅲ is accelerated by IO-3 with the KBr.The fading of the color intensity of Beryllium Ⅲ is found to be directly proportional to the amount of iodinate present.Based on these facts,a photometric method for the determination of iodine in salt was proposed.The decrease in absorbency（ΔA） was measured at the wavelength of 485 nm which is the absorption maximum of Beryllium Ⅲ.The detection limit is 1.47×10-8g/mL and the linear range is 0～12 μg/10 ml for iodine.
It is found that in the medium of H_2SO_4,the fading reaction of Beryllium Ⅲ is accelerated by IO^-_3 with the KBr.The fading of the color intensity of Beryllium Ⅲ is found to be directly proportional to the amount of iodinate present.Based on these facts,a photometric method for the determination of iodine in salt was proposed.The decrease in absorbency(ΔA) was measured at the wavelength of 485 nm which is the absorption maximum of Beryllium Ⅲ.The detection limit is 1.47×10^(-8)g/mL and the linear range is 0～12 μg/10 ml for iodine.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2004年第1期97-98,共2页
Chemical Research and Application
