%0 Journal Article
%T Spectrophotometric Method for Determination of Chromium Ion in Aqueous Solution Using Ninhydrin
%A Hutaf Mustafa Baker
%A Tiba Dheyaa Rahoomi
%A Hamzeh Abdel-Halim
%J American Journal of Analytical Chemistry
%P 382-398
%@ 2156-8278
%D 2022
%I Scientific Research Publishing
%R 10.4236/ajac.2022.1310026
%X A simple, precise, inexpensive and reproducible spectrophotometric method was investigated for the determination of chromium ion (III) in aqueous media, this method based on the formation of a complex between chromium ion (III) and ninhydrin, a deep greenish-violet colored product in the presence of potassium hydroxide was obtained. The absorption of this product was measured at <i>¦Ë</i><sub>max</sub> = 375 nm. The reaction proceeds quantitatively at room temperature. The linear calibration curve was constructed over range of (4.8 ¡Á 10<sup>-4</sup> - 1.6 ¡Á 10<sup>-2</sup>) mol/L of chromium ions with molar absorptivity of 2.90 ¡Á 10<sup>2</sup> and correlation coefficient R<sup>2</sup> = 0.9989. The calculated Sandell¡¯s sensitivity value is 0.179 ¦Ìg/cm<sup>2</sup>, the limits of detection (LOD) and the limit of quantification (LOQ) are found to be 3.74 ¡Á 10<sup>-5</sup> and 1.24 ¡Á 10<sup>-4</sup> mol/L, respectively. The method was successfully applied for determination of the chromium ion in aqueous solution. The stoichiometry of the reactions was determined molar combining ratio of 1:2 between chromium and ninhydrin.
%K Ninhydrin
%K Chromium Ions
%K Spectroscopy
%K Stoichiometry
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=120878