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Diyala Journal for Pure Science

Scientific Refereed Journal Published By College of Science - University of Diyala


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Diyala Journal for Pure Science DJPS


P- ISSN:2222-8373, E-ISSN:2518-9255

Volume 13, Issue 3, Part 1 , July. 2017


Qualitative and Semi Quantitative Analysis of Sample from Kolosh Formation in Kurdistan Region North of Iraq


Tahir Ahmad Tahir , Omer Fikrat Bahjet


Year: 2017, Volume: 13, Issue: 3, Part: 1


Pages: 56-71, DOI: http://dx.doi.org/10.24237/djps.1303.194B 


Language: English


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A sample from Kolosh formation nearby Hizop small village near Kaniwatman area in Kurdistan region was taken for the purpose of conducting qualitative and semi-quantitative analysis for most of elements that constitute the sample. Initial simple physical examination shows that the sample contains a percentage of iron (III) oxide. Three parts of the sample were allowed to react with three in excess concentrated hydrochloric, nitric and sulphuric acids separately. The reaction with HCl gives deep yellow solution, with HNO3 and with H2SO4 gives colorless solution. Most of the transition elements in the periodic table were excluded for the absences of the characteristic colors of their ions in solutions. Analysis shows that the percent of total organic carbon (TOC) in the sample was 5.3%, for silica was 26.9% and for iron was 2.5%. The percentages of missing weight from the samples after their reaction with sulphuric, nitric and hydrochloric, acids were, 42.3%, 44.3% and 48.7% respectively. The group’s qualitative analysis for Kolosh sample showed a measureable presence of iron, silicon, carbon and calcium compounds. The presence was very low for other elements compound like barium, aluminum, lead and thallium. The aim of this work is a qualitative and semi quantitative analysis for probable existence of some elements compound in Kolosh formation mineral. 


Key Wards: Kolosh formation, Shale mineral, Calcium carbonate, Calcium sulphate, Silica, Total organic carbon (TOC).

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