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Analysis of Diet Tonic Water Using Capillary Electrophoresis. An Undergraduate Instrumental Analysis Experiment
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Abstract
An experiment for instrumental analysis is described in which components of diet tonic water are determined using capillary electrophoresis. Separation of quinine, saccharin, and benzoate in pH 7 phosphate buffer, with phenol as internal standard, is accomplished in about 12 minutes. The equipment requirements are modest: UV detection on an unmodified column. One of the components, quinine, is quantitated using a four-point standard addition calibration curve.
Keywords (Audience):
Second-Year UndergraduateKeywords (Domain):
Analytical ChemistryKeywords (Pedagogy):
Hands-On Learning / ManipulativesKeywords (Subject):
Instrumental MethodsCiting Articles
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This article has been cited by 10 ACS Journal articles (5 most recent appear below).
Capillary Electrophoresis: Focus on Undergraduate Laboratory Experiments
Lisa A. HollandJournal of Chemical Education2011 88 (3), 254-256Capillary Electrophoresis: Focus on Undergraduate Laboratory Experiments
Lisa A. HollandJournal of Chemical Education2011 88 (3), 254-256Capillary electrophoresis is a versatile technique well suited to teach concepts that are fundamental to a chemistry degree program. The applicability of capillary electrophoresis to metabolites, DNA, proteins, pharmaceutical compounds, environmental ...
Using FTIR-ATR Spectroscopy To Teach the Internal Standard Method
Michael K. BellamyJournal of Chemical Education2010 87 (12), 1399-1401Using FTIR-ATR Spectroscopy To Teach the Internal Standard Method
Michael K. BellamyJournal of Chemical Education2010 87 (12), 1399-1401The internal standard method is widely applied in quantitative analyses. However, most analytical chemistry textbooks either omit this topic or only provide examples of a single-point internal standardization. An experiment designed to teach students how ...
How Many Atomic Layers of Zinc Are in a Galvanized Iron Coating?
Shui-Ping YangJournal of Chemical Education2007 84 (11), 1792How Many Atomic Layers of Zinc Are in a Galvanized Iron Coating?
Shui-Ping YangJournal of Chemical Education2007 84 (11), 1792This article describes an experiment using a novel gasometric assembly to determine the thickness and number of atomic layers of zinc coating on galvanized iron substrates. Students solved this problem through three stages. In the first stage, students ...
An Inexpensive Device for Capillary Electrophoresis with Fluorescence Detection
Jonathan E. Thompson and Khriesto Shurrush , Greg AndersonJournal of Chemical Education2006 83 (11), 1677An Inexpensive Device for Capillary Electrophoresis with Fluorescence Detection
Jonathan E. Thompson and Khriesto Shurrush , Greg AndersonJournal of Chemical Education2006 83 (11), 1677We describe an inexpensive device for performing capillary electrophoresis (CE) separations with fluorescence detection. As a demonstration of the device's utility we have determined the mass of riboflavin in a commercially available dietary supplement. ...
Weak Acid pKa Determination Using Capillary Zone Electrophoresis
Mike SolowJournal of Chemical Education2006 83 (8), 1194Weak Acid pKa Determination Using Capillary Zone Electrophoresis
Mike SolowJournal of Chemical Education2006 83 (8), 1194This article describes a general chemistry experiment designed to measure the pKa of benzoic acid using capillary zone electrophoresis. Despite the fact that modern biology relies so heavily on this analytical technique, students get very little ...
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- Received: August 03, 2009
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