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Spectrophotometric determination of copper and iron subsequent to the simultaneous extraction of bis(2,9-dimethyl-1,10-phenanthroline)copper(I) and bis[2,4,6-tri(2-pyridyl)-1,3,5-triazine]iron(II) into propylene carbonate.

Authors
Stephens-BG; Felkel-HL Jr.; Spinelli-WM
Source
Anal Chem 1974 May; 46(6):692-696
NIOSHTIC No.
00045128
Abstract
As a result of studies to find simple and reliable analytical methods for the determination of copper (7440508) and iron (7439896) it has been found that propylene carbonate (4-methyl-1,3-dioxolane-2- one) (108327) simultaneously extracts the 2,9-dimethyl-1,10- phenanthroline (neocuproine; NC) chelate of copper(I) and the tri(2- pyridyl)-1,3,5-triazine (TPTZ) chelate of iron(II) from acetate- buffered aqueous solutions. Molecular absorption spectrophotometric quantification is accomplished by measuring the absorbance of the iron(II)-TPTZ chelate at 596 nm and that of the copper(I)-NC chelate at 458 nm. The copper(I)-NC chelate does not absorb at 596 nm and consequently copper does not interfere with the determination of iron. The iron(II)-TPTZ chelate exhibits an absorbance at 458 nm that is 0.123 times its absorbance at 596 nm; therefore, correction for the effect of iron on the determination of copper is straightforward. The development of the method and the results of analyses of sea water, tap water, and aluminum alloy are reported.
Keywords
NIOSH-Publication; NIOSH-Grant; Grants-other; Methodology; Extractants; Spectrophotometry; Triazines; Metals
Contact
Chemistry Department of Chemistry Wofford College Spartanburg, S C 29301
CODEN
ANCHAM
CAS No.
7440-50-8; 7439-89-6; 108-32-7
Publication Date
19740501
Document Type
Journal Article
Funding Amount
43656.00
Funding Type
Grant
Fiscal Year
1974
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-00324
Issue of Publication
6
ISSN
0003-2700
Priority Area
Other Occupational Concerns; Grants-other
Source Name
Analytical Chemistry
State
SC
Performing Organization
Wofford College, Spartanburg, South Carolina
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