https://caribjscitech.com/index.php/cjst/issue/feed Caribbean Journal of Sciences and Technology 2022-09-25T07:27:54+00:00 M/s. ChemBio International editors@caribjscitech.com Open Journal Systems <p style="text-align: justify;"><em>Caribbean Journal of Science and Technology (CJST)</em> is a half yearly (from 2022), international, open access, peer-reviewed Journal and committed to publish multidisciplinary subjects related to biological, chemical, pharmaceutical, and all technological sciences. Further, CJST preferably encourages articles with novelty. CJST publishes manuscripts of the type Full-length research articles, Review articles, Mini-reviews, Short communications, Case Studies, Perspectives and Letters to the Editor.</p> https://caribjscitech.com/index.php/cjst/article/view/250 QUANTIFICATION OF IMPURITY-E IN VORICONAZOLE POWDER FOR SOLUTION FOR INFUSION (200 MG/VIAL) BY USING HIGH PERFORMANCE LIQUID CHROMATOGRAPHY 2022-06-17T12:32:04+00:00 Sanni Babu Najana n.sannibabu@gmail.com Bala Murali Krishna Khandapu balamuralichem@gmail.com <p>A novel stability indicating liquid chromatographic method was developed and validated for the quantification of impurity<strong>-E</strong>(<strong>(±)-β-Camphorsulfonic acid, (±)-Camphor-10-sulfonic acid)</strong>in Voriconazole powder for solution for infusion formulation. The separation was achieved on Novapak (150 x 3.9 mm, 4 μm) column using a movable segment consisting of pH 5.0 acetate buffer and acetonitrile gradient elution mode, at a flow rate of 1.0 ml/min. Column oven maintained at 35°C, inoculation quantity 50 µl, sample cooler temperature 5 °C and detection wavelength 286 nm. Chromatographic resolution between impurity-E and Voriconazole was found to be 22.1. Technique was extensively validated for the quantification of impurity-E in Voriconazole powder for solution for infusion formulation and established to be vigorous. Method was established extremely specific as all other related impurities were separated from the impurity-E. The Limit of quantitation (LOQ) and limit of detection (LOD) for impurity-E were 6.0μg/ml and 2.0 μg/ml respectively.</p> 2022-09-18T00:00:00+00:00 Copyright (c) 2022 Caribbean Journal of Sciences and Technology https://caribjscitech.com/index.php/cjst/article/view/271 Zn(OAc)2.2H2O-Catalyzed C3-alkylation and O-alkylation of 4-Hydroxycoumarin derivatives 2022-09-25T07:27:54+00:00 Sravan Kumar Bandaru sravankumarbandaru@gmail.com Matthew C. Risi mcr9@students.waikato.ac.nz <p>For the C3-alkylation and O-alkylation of 4-hydroxycoumarins with benzylic, allylic, and corresponding acetates, respectively, under neat conditions at 60 <sup>0</sup>C with high product yield, Zn(OAc)<sub>2</sub>.2H2O has been found to be an effective reusable solid superacid catalyst.</p> 2022-09-30T00:00:00+00:00 Copyright (c) 2022 Caribbean Journal of Sciences and Technology