عنوان	Cathodic Adsorptive Stripping Voltammetric Determination of Trace Amounts of Uranium (VI) Based on Its Complex with Chromazorul-S
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	Cathodic Adsorptive Stripping,Uranium (VI)
چکیده	An adsorptive stripping voltammetric procedure for trace determination of uranium (U) (VI) at a hanging mercury drop electrode is described. The complex of U(VI) with Chromazorul-S was adsorbed and accumulated from an ammonia buffer solution of pH 8.8 including 2.4 ´ 10–5M Chromazorul-S at the potential !0.2 V for 120 s. After that the cathodic voltammograms were recorded by potential sweep from –0.2 to –0.9 V in the differential pulse mode. The relationship between the cathodic peak currents versus U(VI) concentrations was linear over the range of 0.7–340 ng/mL. The detection limit was 0.1 ng/mL and the relative standard deviations (7 determinations) at 10, 100, and 300 ng/mL U(VI) were 2.1, 1.6, and 1.1%, respectively. The validity of this method was estimated by determination of spiked U(VI) in natural water and soil samples. The results were successful.
پژوهشگران	علیرضا محدثی (نفر اول)، لاله حسین زاده (نفر دوم)، شهریار عباسی (نفر سوم)، محمد اسفندیارپور (نفر چهارم)