2009 Student Research Conference:
22nd Annual Student Research Conference

Quantitative Determination of Chromium (VI) Using Sol-Gel Encapsulated Redox Chemistry and Spectrophotometry
Eric M. Steffensmeier
Dr. David McCurdy, Faculty Mentor

Chromium (VI) is present in nature, and is toxic and carcinogenic. Chromium (III), however, is an essential nutrient for humans. The most common ways to measure chromium (VI) either do not distinguish between the oxidation state of chromium or require very expensive instruments. A new method is hoped to be developed which is simple, selective, sensitive, and inexpensive. A series of redox reactions will ultimately oxidize leuco crystal violet (LCV), which produces a violet color. Only chromium (VI) will cause this reaction to occur spontaneously. To increase the limit of detection, LCV in placed in a sol-gel, which concentrates the purple color into a much smaller volume. Spectrophotometry is used make a calibration curve. The sol-gel synthesis is now at an adequate stage such that the redox reaction can be performed within the gels. Optimizing this process and making a calibration curve are expected in the future.

Keywords: Analytical Chemistry, Sol-Gels, Chromium (VI)

Topic(s):Chemistry

Presentation Type: Oral Paper

Session: 8-5
Location: VH 1236
Time: 9:15

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