Annals of Advances in Chemistry Open Access HTTPS://WWW.HEIGHPUBS.ORG ISSN 2576-3768 Abstract The industrial production and use of chromium have grown considerably during the past five decades. Abundances of the chromium isotopes in terrestrial samples are identical to 0.01%. Among the dominant species of chromium, the trivalent form widely occurs in nature in chromite ores which is extremely immobilized especially in water bodies. Samples were mixtures of separated chromium isotopes and the calibration was made with the same species as those used in the measurements. The method had simplified the conversion of the ores to chromyl fluoride since the element could be readily separated as lead chromate from the leaching of chromite-sodium peroxide fusions. Isotope assay of chromyl fluoride under certain conditions was measured and the measurements of chromium isotopic anomalies ratios and isotope abundance of the chromite ores have been assessed. These provided sufficient quantitative mass spectrometric data, which were analyzed to calculate the abundance and the mean atomic mass of the questioned isotopes. Based on the high mass spectroscopy stability and the correction factors, the results were of good precision (incl. negligible systematic errors normally associated to inter-laboratory discrepancies) and the Cr isotopes availability ( 52 Cr > 53 Cr > 50 Cr > 54 Cr) was in conjunction with other classical tools such as oxygen isotopes. This paper is important for paleoecological, environmental, archeological, forensic, and nuclear researchers. Research Article Chromium Isotopes Detection in their Ores with Minimal Errors Loai Aljerf 1 * and Nuha AlMasri 2 1 Department of Basic Sciences, Faculty of Dental Medicine, Damascus University, Mazzeh Highway, Almazzeh, Damascus, Syria 2 Department of Chemistry, Faculty of Medicine, Syrian Private University, Damascus, Syria *Address for Correspondence: Loai Aljerf, De- partment of Basic Sciences, Faculty of Dental Medicine, Damascus University, Mazzeh High- way, Almazzeh, Damascus, Syria, Tel: +963-93 34 46 993; Email: envirochrom@hotmail.com; loai.aljerf@aol.com Submitted: 21 July 2018 Approved: 03 September 2018 Published: 04 September 2018 Copyright: 2018 Aljerf L, et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Keywords: Chromium; Abundance; Isotope; Mass spectroscopy; Precision How to cite this article: Aljerf L, AlMasri N. Chromium Isotopes Detection in their Ores with Minimal Errors. Ann Adv Chem. 2018; 2: 045-054. https://doi.org/10.29328/journal.aac.1001013 Introduction Chromium is one of the elements on which no systematic study of the isotopic abundances has been made with regard to the geological source of the materials [1,2]. All the results of previously reported works were obtained with chemical reagents taken from the usual stores of these materials. As is evident in table 1, there is no real agreement among any of the results. The main supply of chromium chemicals available in many countries, is from the chromite deposits [7,8]. Thus, it appears that the variation of the results listed in table 1, with the exception of those of Nowak [3], may be due to fractionation brought about in the chemical processing of the ores or by natural geological processes; or, they may be due to unknown discriminations involved in the various instruments with which the measurements were made. Table 1: Previous determinations of the abundances of the chromium isotopes, in atoms percent. Measurement Ion source reagent observer 1 Gas discharge Cr(CO) 6 [3] 2 Thermionic Cr metal [4] 3 Electron impact CrCl 3 [5] 4 Electron impact CrCl 3 [6] Isotope 50 4.9 4.49 4.31±0.04 4.41±0.06 Isotope 52 81.6 83.8 83.8±0.14 83.5±0.11 Isotope 53 10.4 9.55 9.55±0.09 9.54±0.06 Isotope 54 3.1 2.31 2.38±0.02 2.61±0.09