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ISE Analysis of Hydrogen Sulfide in Cigarette Smoke

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Guofeng Li , Brian J. Polk , Liz A. Meazell and David W. Hatchett

Department of Chemistry & Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332-0400

J. Chem. Educ., 2000, 77 (8), p 1049

DOI: 10.1021/ed077p1049

Publication Date (Web): August 1, 2000

Section:

History, Education, and Documentation

Abstract

Many advanced undergraduate analytical laboratory courses focus on exposing students to various modern instruments. However, students rarely have the opportunity to construct their own analytical tools for solving practical problems. We designed an experiment in which students are required to build their own analytical module, a potentiometric device composed of a Ag/AgCl reference electrode, a Ag/Ag₂S ion selective electrode (ISE), and a pH meter used as voltmeter, to determine the amount of hydrogen sulfide in cigarette smoke. Very simple techniques were developed for constructing these electrodes. Cigarette smoke is collected by a gas washing bottle into a 0.1 M NaOH solution. The amount of sulfide in the cigarette smoke solution is analyzed by standard addition of sulfide solution while monitoring the response of the Ag/Ag₂S ISE. The collected data are further evaluated using the Gran plot technique to determine the concentration of sulfide in the cigarette smoke solution. The experiment has been successfully incorporated into the lab course Instrumental Analysis at Georgia Institute of Technology. Students enjoy the idea of constructing an analytical tool themselves and applying their classroom knowledge to solve real-life problems. And while learning electrochemistry they also get a chance to visualize the health hazard imposed by cigarette smoking.

Keywords (Audience):

Second-Year Undergraduate

Keywords (Domain):

Analytical Chemistry

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Aqueous Solution Chemistry

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This article has been cited by 1 ACS Journal articles (1 most recent appear below).

Measurement of Trace Metals in Tobacco and Cigarette Ash by Inductively Coupled Plasma-Atomic Emission Spectroscopy
W. Wang and B. J. Finlayson-Pitts
Journal of Chemical Education2003 80 (1), 83
- Measurement of Trace Metals in Tobacco and Cigarette Ash by Inductively Coupled Plasma-Atomic Emission Spectroscopy
  W. Wang and B. J. Finlayson-Pitts
  Journal of Chemical Education2003 80 (1), 83
  The ICP–AES experiment reported here is suitable for use in a junior- or senior-level undergraduate instrumental analysis laboratory. The objective of this experiment is to analyze trace metals present in cigarette tobacco, the cigarette filter, and the ...
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