Lola Harrison

Document Type


Date of Award



College of Science, Engineering, and Technology (COSET)

Degree Name

MS in Chemistry

First Advisor

Mahmoud Abbas Saleh


This study of the water sample from the Brazos River was completed through the collection of samples in a selected site of the Brazos River in Southwestern Texas. These water samples were mixed and their analysis revealed the contamination by organochlorines (OCPs), organophosphates (OPPs) pesticides residues, multiple cations and anions of which ,some were of anthropogenic origin in the river. Three organochlorine pesticides, one organophosphate, multiple cations and anions were detected in the Brazos river sample. The organophosphate that was detected was in the baseline of the instrument and therefore, does not measure into acceptable level for this research. The samples were made into 7 groups of 1 liter each and solvent extracted, cleaned up by column dehydration, and concentrated to 1ml in ultra-pure hexane before analysis by GC/ECD (Gas Chromatograph with Electron Capture Detector), GCIFPD (Gas Chromatograph with Flame Photometric Detector), and GCIMS (Gas Chromatograph with Mass Spectrometry) while samples from the original container were directly injected into the IC (Ion Chromatograph).