Coulometric Titration of Ethylenediaminetetraacetate (EDTA) with Spectrophotometric Endpoint Detection: An Experiment for the Instrumental Analysis Laboratory

Ethylenediaminetetraacetate (EDTA) is commonly used as an anticoagulant in blood-collection procedures. In this experiment for the instrumental analysis laboratory, students determine the quantity of EDTA in commercial collection tubes by coulometric titration with electrolytically generated Cu2+. T...

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Bibliographic Details
Published in:Journal of chemical education 2011-03, Vol.88 (3), p.315-316
Main Authors: Williams, Kathryn R., Young, Vaneica Y., Killian, Benjamin J.
Format: Article
Language:English
Subjects:
Analytical chemistry
Anticoagulants
Chemistry
Collection
Coulometers
Electrolytes
Ethylenediaminetetraacetic acids
Experiments
Fiber optics
Light
Measurement Equipment
Measuring instruments
Optical fibers
Organic chemistry
Science education
Science Experiments
Science Instruction
Science Laboratories
Scientific Concepts
Spectrophotometry
Students
Titration
Tubes
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Summary:Ethylenediaminetetraacetate (EDTA) is commonly used as an anticoagulant in blood-collection procedures. In this experiment for the instrumental analysis laboratory, students determine the quantity of EDTA in commercial collection tubes by coulometric titration with electrolytically generated Cu2+. The endpoint is detected spectrophotometrically using a UV−vis spectrophotometer equipped with a fiber optic probe. Students gain experience with two instrumental methods and learn about a practical application of complexation chemistry.
ISSN:0021-9584
1938-1328
DOI:10.1021/ed100627q