تحديد الرصاص بكاشف إيروكروم الأزرق SE باستخدام الطريقة الطيفية الضوئية

الملخص EN

A simple and sensitive spectrophotometric method has been developed for determining lead (||) with Ereiochrom blue S.

E.

This method relies on the formation of a stable violet colored complex at pH= 8 where it has a maximum absorption at 592 nm.

The optimal conditions for the formation of the complex were studied.

However, the complex is formed momentarily, but it is stable for 12 days.

The molecular ratio was investigated by the continuous variation method, mole Ratio and slop ratio.

The ion reactive ratio (ion: reagent) were 2:3, Lambert - Beer's law was obeyed in the concentration rang of 1.0-8.5 ppm with detection limit of 1.56 µg/ml, relative standard deviation not exceed 2.459%.

Sandell sensitivity was 0.01036 μg cm-2and molar absorptivity was 4×105 l mol-1 cm-1 .

by this method could determine lead (||) with high precision, accurate and sensitive, without any interferences with a number of metal ions