Poster Sessions - 2018 Research Day

Event Title

Investigation into Spectro-photo Detection of Lead in Water

Location

Hall of Governors

Start Date

4-6-2018 10:30 AM

End Date

4-6-2018 12:00 PM

Abstract

Lead ions is a very common pollutant in water which has the potential to be dangerous, causing serious disease and health problems which can affect people. Lead is toxic and prolonged exposure to lead ions will cause serious brain and nervous system damage. Chelation is a type of bonding of ions and molecules to metal ions and it involves the formation or presence of two or more separate coordinate bonds between a polydentate ligand and a single central atom. Most of the current analytical methods used to analyze Pb 2+ and Pb1+ are inductively coupled plasma-optical emission spectroscopy, inductively coupled plasma-mass spectrometry, atomic absorption spectrometer and graphite furnace atomic absorption spectrometer. However, those methods require expensive equipment and those methods are more complicated in terms of the calibration and sample preparation. The spectroscopy method without chemical reagent proves to be useful and it is a non-destructive method. The benefits of using UV-Vis is its capability of measuring even trace amounts of lead under 1ppb and its applicable to all organic and inorganic samples including alkali earth elements. During this application, a total of six samples were prepared by using Pb 2+ and Pb1+, reverse osmosis water, and distilled water. Samples were prepared by using micropipettes and then were measured using UV spectroscopy after the sample preparation. The spectrometer used during this research was the Thermo Scientific Spectronic 200 and the wavelengths were measured in increments of five starting at 400nm to 600nm.

The purpose of doing this study is to monitor the concentration of how lead performs in water by taking the UV-Vis spectrum of all the samples and see which spectrum correlates to the chelating agent. So instead of calculating the lead concentrations, we are looking at the baseline shift to see if the un-reacting chelating agent is affecting these results. After further verification we determined that Pb-1 contains potassium cyanide, so the mystery peak (shown below) is not due to the resorcinol reagent.

Faculty / Staff Sponsor

Dr. John Sowa

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Apr 6th, 10:30 AM Apr 6th, 12:00 PM

Investigation into Spectro-photo Detection of Lead in Water

Hall of Governors

Lead ions is a very common pollutant in water which has the potential to be dangerous, causing serious disease and health problems which can affect people. Lead is toxic and prolonged exposure to lead ions will cause serious brain and nervous system damage. Chelation is a type of bonding of ions and molecules to metal ions and it involves the formation or presence of two or more separate coordinate bonds between a polydentate ligand and a single central atom. Most of the current analytical methods used to analyze Pb 2+ and Pb1+ are inductively coupled plasma-optical emission spectroscopy, inductively coupled plasma-mass spectrometry, atomic absorption spectrometer and graphite furnace atomic absorption spectrometer. However, those methods require expensive equipment and those methods are more complicated in terms of the calibration and sample preparation. The spectroscopy method without chemical reagent proves to be useful and it is a non-destructive method. The benefits of using UV-Vis is its capability of measuring even trace amounts of lead under 1ppb and its applicable to all organic and inorganic samples including alkali earth elements. During this application, a total of six samples were prepared by using Pb 2+ and Pb1+, reverse osmosis water, and distilled water. Samples were prepared by using micropipettes and then were measured using UV spectroscopy after the sample preparation. The spectrometer used during this research was the Thermo Scientific Spectronic 200 and the wavelengths were measured in increments of five starting at 400nm to 600nm.

The purpose of doing this study is to monitor the concentration of how lead performs in water by taking the UV-Vis spectrum of all the samples and see which spectrum correlates to the chelating agent. So instead of calculating the lead concentrations, we are looking at the baseline shift to see if the un-reacting chelating agent is affecting these results. After further verification we determined that Pb-1 contains potassium cyanide, so the mystery peak (shown below) is not due to the resorcinol reagent.