Perbandingan Metode Potensiometri dan Spektrofotometri pada Penentuan Formalin

Abstract

A research on formaldehyde determination using potentiometric and spectrophotometric methods has been carried out. The aim of this study was to compare the results of formaldehyde content in samples between potentiometric methods and spectrophotometric methods. The research began by making a formaldehyde sensor using cellulose acetate as the ionophore. The next step was measuring the formaldehyde levels of the sample using a sensor and spectrophotometric methods. The results of the formaldehyde measurement were compared between the two methods. The results showed that the formaldehyde concentration measured using the spectrophotometric method was 1.275; 2.071 and 2.978 ppm, while using the potentiometric method of 1.40; 2.08 and 3.07 ppm. Basedon the calculation, the value of tcount < ttable for DB (n-2) shows that there is no significant difference between the potentiometric method and the spectrophotometric method in determining formaldehyde. Keywords : formaldehyde, spectrophotometric, potentiometric.