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Abstract

Sulfur anions, including sulfide ions, are greatly important chemically, industrially, and environmentally. The reactivity nature of sulfide ions is the main problem in the measurement of this anion. Thus, the use of rapid, selective, and cheap methods to determine this species is an important aspect of controlling industrial processes and protecting the environment. In the present study, a simple method for the fabrication of a sulfide ion-selective electrode has been proposed. Parameters that are effective on measurements such as time, effect of interfering ion, and pH were investigated. The grading curve in this method has a linear range from 10^-5 to 10^-1 mol/L, and the percentage of relative standard deviation is 1.3%, with a detection limit of 10^-7 x 5.1 mol/L. Simple and available laboratory equipment, appropriate sensitivity, and low cost are important advantages of this method‎.