عنوان مقاله [English]
نویسندگان [English]چکیده [English]
A precise procedure is used for determination of chloride in the nuclear grade zircaloy (containing <20 ppm chloride) which is necessary in the nuclear industry. In this investigation, an appropriate method for chemical analysis of chloride in zirconium metal and zirconium alloys is developed. In this approach the effective parameters in Turbidity such as pH, residence time of solutions in darkness, silver ion concentration and light effects have been investigated and optimized. The proposed method is compared with the spectrophotometric determination of chloride by mercury (II) thiocyanate through calibration and standard addition methods. The obtained results by turbidimetric and nephelometric methods are confirmed with the spectrophotometric method. In the range of 0.1-2 ppm, the concentration and turbidity are linearly related, having a correlation coefficient of r = 0.997. The detection limit of the proposed method is 0.03 ppm and the relative standard deviation for five repeated experiments of 0.2, 0.5, 1.0 and 1.5 ppm of chloride are 9.0, 6.2, 3.0 and 2.0 percent, respectively.