GC-MS

This study aimed to identify, quantify and compare the phytochemical constituents present in the ethanolic leaf extracts of four Cola species - Cola acuminata, Cola rostrata, Cola parchycarpa, and Cola nitida, using Gas Chromatography-Mass Spectrometry (GC-MS). The analysis revealed varying numbers of distinct peaks: 77 for C. acuminata, 47 for C. rostrata, 43 for C. parchycarpa, and 45 for C. nitida, indicating diverse phytochemical profiles among the species. In C. acuminata, 14-Pentadecenoic acid (5.93%) was the dominant compound, with a retention time of 33.746 minutes.

The study was to determine the concentrations and risks of organophosphorus pesticides (OPPs) residues in edible vegetable oils (EVOs) sold in markets in Warri, Delta State. OPPs in six edible vegetable oils purchased from local vendors in markets in Warri, Delta State were quantified with a gas chromatograph coupled with a mass spectrometry (GC-MS) after solvent extraction. The results showed concentration of the ∑14 OPPs varying from 4.10 to 22.82 ng/L. The unbranded edible vegetable oils had higher concentrations than their respective branded vegetable oils.