Determination of Hg2+ by diphenylcarbazone compound in polymer film

A sensitive optical sensor for determining Hg^2+ concentration has been prepared by incorporating the indicator dye, diphenylcarbazone, into cellulose acetate polymer film. The sensor was fabricated by binding diphenylcarbazone to a cellulose acetate film that had been previously subjected to exhaustive base hydrolysis. The method is easy to perform and uses acetyl cellulose as a carrier. The results showed that the sensor has the ability to determine the Hg^2+ concentration with ±6% error. Also, the adsorption capacity was 3.41 × 10^3 mmol/g.