https://journals.eanso.org/index.php/ijpac <p>This is a scholarly peer-reviewed journal hosted by the East African Nature and Science Organization. It aims at bridging the gap between researchers and information consumers in Chemistry. All the articles are open access for both researchers and contributors. We accept articles in the disciplines of Organic Chemistry, Analytical Chemistry, Physical Chemistry, Inorganic Chemistry and Biochemistry.</p> East African Nature and Science Organization en-US International Journal of Pure and Applied Chemistry 2790-9565 https://journals.eanso.org/index.php/ijpac/article/view/722 <p>ATR-FTIR analysis is a robust method that is used to analyse solids and liquid samples with minimal sample preparation. The samples are usually placed on the ATR crystals and pressure applied to obtain a clear spectrum. Essential oils from O. kenyense were extracted through hydro distillation using the Clavenger apparatus for 8 hours. The essential oils were dried by passing through anhydrous sodium sulphate after which they were placed in brown viols and refrigerated at 4℃. The sample of oils was latter analysed at the government chemist in Nairobi County in Kenya. Compounds that recorded a high hit quality of 600 and above had the highest probability of being present in the oil. Eucalyptus oil had a hit quality of 673 and 1, 8-cionele had a hit quality of 655 respectively. Therefore, the two were presumed to be present in O. kenyense essential oils</p> Mwaura J. Njuguna Mary Muriuki, PhD Samuel Karenga, PhD ##submission.copyrightStatement## 2022-06-22 2022-06-22 1 1 1 10 10.37284/ijpac.1.1.722 https://journals.eanso.org/index.php/ijpac/article/view/841 <p>The leaves of Solanecio manii were collected from sampled plants in Kandara Sub-County Muranga County in Kenya. The aim of collection of the leaves was to carry out the extraction and analysis of essential oils from S. manii. The leaves were transported to the pharmacognosy laboratory at the Mount Kenya University. The leaves were washed with running tap water and rinsed with distilled water to remove physical and chemical contaminants. They were air dried on the laboratory benches for seven days to lose 90% of moisture content. The essential oils (Eos) were extracted from 200.000 g of dry leaves by hydrodistillation using the Clavenger apparatus for 8 hours. The rate of essential oil production from the leaves was computed and found to be 0.01%. GC-MS instrument was utilized to analyse the qualitative and quantitative composition of essential oils. The compounds that were found present in the total ion chromatogram were, 3-Carene (40%), Limonene (35.48%), 1-undecanol (8.0%), β-pinene (6.4%), Menthol (1.6%), β-Cymene (1.1%) Longifolene (0.78%) and α-terpenolene (0.5%).</p> Mwaura J. Njuguna ##submission.copyrightStatement## http://creativecommons.org/licenses/by/4.0 2022-09-15 2022-09-15 1 1 11 17 10.37284/ijpac.1.1.841