Detecting Copper in Water Using Electrochemiluminescence
Date of Graduation
Spring 2002
Degree
Master of Science in Chemistry
Department
Chemistry and Biochemistry
Committee Chair
Mark Richter
Abstract
The detection of copper ions as Cu(dmp)₂⁺ (dmp=2,9 -dimethyl-1,10-phenanthroline) using electrochemiluminescence (ECL) is reported. Cu(dmp)₂⁺ is formed in situ by reducing Cu₂⁺ ions to Cu⁺ with hydroxylamine hydrochloride and then complexing with the chelating agent dump. ECL was generated by oxidizing Cu(dmp)₂⁺ in the presence of tri-n-propylamine (TPA). The ECL intensity peaks at a potential corresponding to oxidation of both TPA an Cu(dmp)₂⁺, indicating that the emission is from a Cu(dmp)₂⁺ metal-to-ligand charge transfer excited state. Conditions for ECL omission were optimized and used to generate a calibration curve that was linear over the 0.1-5 mg/L (ppm) range. The theoretical limit of detection was 6 μg/L (ppb), with a practical limit of detection of 0.1 ppm. The ECL of several metals ions other than copper with dmp and their effects on Cu(dmp)₂⁺ ECL were examined.
Subject Categories
Chemistry
Copyright
© Brian Douglas High
Recommended Citation
High, Brian Douglas, "Detecting Copper in Water Using Electrochemiluminescence" (2002). MSU Graduate Theses. 669.
https://bearworks.missouristate.edu/theses/669
Dissertation/Thesis