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Hue, N.T., Hop, N.V., Long, H.T., Phong, N.H., Uyen, T.H., Le Quoc Hung, L.Q., and Nguyen Nhi Phuong, N.N. (2020) Determination of Chromium in Natural Water by Adsorptive Stripping Voltammetry Using In Situ Bismuth Film Electrode. Journal of Environmental and Public Health, 2020, Article ID: 1347836.
https://doi.org/10.1155/2020/1347836

has been cited by the following article:

• TITLE: Spectrophotometric Method for Determination of Chromium Ion in Aqueous Solution Using Ninhydrin

  AUTHORS: Hutaf Mustafa Baker, Tiba Dheyaa Rahoomi, Hamzeh Abdel-Halim

  KEYWORDS: Ninhydrin, Chromium Ions, Spectroscopy, Stoichiometry

  JOURNAL NAME: American Journal of Analytical Chemistry, Vol.13 No.10, October 31, 2022

  ABSTRACT: 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 λmax = 375 nm. The reaction proceeds quantitatively at room temperature. The linear calibration curve was constructed over range of (4.8 × 10-4 - 1.6 × 10-2) mol/L of chromium ions with molar absorptivity of 2.90 × 102 and correlation coefficient R2 = 0.9989. The calculated Sandell’s sensitivity value is 0.179 μg/cm2, the limits of detection (LOD) and the limit of quantification (LOQ) are found to be 3.74 × 10-5 and 1.24 × 10-4 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.