Study on the Colour Reaction of Ternary Complex of Yttrium-Rutin-Cetyltrimethylammonium Bromide

摘要

In the presence of CTMAB, the photometric properties of rutin ternary complex are studied and a new method is found for the determination of yttrium. The experimental results show that yttrium reacts with rutin and CTMAB to form an orange complex. The maximum absorption wavelength is 450 nm and the amount of NaOH buffer solution is 2 mL. The added amount of CTMAB is 5 mL and the time developing colour is 0.5 h. The apparent molar absorption coefficient of the complex is 2.680 L mrnol~(-1) cm'. Lambert Beer's law is obeyed in the range of 0-0.2 mmol/L for yttrium.