Dissertations and Theses @ UNI
Availability
Open Access Thesis
Keywords
Zinc;
Abstract
The analysis of zinc in the 0-10 microgram range, determined by the loss in absorbance of a buffered methylene blue solution in the presence of thiocyanate in an aqueous system, is described. The technique was best performed with a 1.0 M NaSCN and 6.0 x 10-5 M methylene blue solution buffered with citrate-phosphate to a pH of 3.2. Absorbance readings were taken from the Cary Model 14 recording spectrophotometer in the range of 500-700 mµ with 666 mµ being used as the most useful wavelength for the attempted zinc analysis. The analysis of zinc was found to be satisfactory in the presence of ten times the amount of Al, Cu, Fe, and Pb by using citrate as a masking agent. Preliminary gravimetric analysis of a purple precipitate, formed during the reaction, indicates a possible ion associated complex having a formula of (MB)2[Zn(SCN)4].2H2O.
Year of Submission
1970
Degree Name
Master of Arts
Department
Department of Chemistry
First Advisor
Ching Woo
Second Advisor
James C. Chang
Third Advisor
Daryl D. Smith
Date Original
1970
Object Description
1 PDF file (55 leaves)
Copyright
©1970 Roger William Craig
Language
en
File Format
application/pdf
Recommended Citation
Craig, Roger William, "A Modification of the Spectrophotometric Determination of Zinc With Methylene Blue and Thiocyanate in an Aqueous System" (1970). Dissertations and Theses @ UNI. 2411.
https://scholarworks.uni.edu/etd/2411
Comments
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