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Title: Separation and determination of parts-per-billion concentrations of gallium in biological materials

Abstract

Gallium is separated from an aqueous digest of a biological matrix, by the selective extraction of the ion pair GaCl/sub 4//sup -/ x R/sub 4/N/sup +/, into a hexane-methyl isobutyl ketone mixture (R/sub 4/N/sup +/ represents the methyltricaprylammonium ion). The extracted gallium species reacts with the ligand, 1,5-bis(salicylidene)-thiocarbohydrazone, to form a complex that fluoresces at 440 nm when the excitation wavelength is 395 nm. This fluorometric method has been used to determine 0.10-40 ppb of gallium in biological materials with a relative precision of 7%. The principal interferences with the fluorometric method in aqueous solutions are Fe/sup 3 +/, Fe/sup 2 +/, Cu/sup 2 +/, and Zn/sup 2 +/. In the aqueous digest, the Fe/sup 3 +/ is reduced to Fe/sup 2 +/ and the Cu/sup 2 +/ is masked with S/sub 2/O/sub 3//sup 2 -/. The Fe/sup 2 +/ and Zn/sup 2 +/ are not extracted into the organic phase and do not interfere with the fluorometric method.

Authors:
; ;
Publication Date:
Research Org.:
Univ. of Arizona, Tucson
OSTI Identifier:
6614187
Resource Type:
Journal Article
Journal Name:
Anal. Chem.; (United States)
Additional Journal Information:
Journal Volume: 59:6
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 54 ENVIRONMENTAL SCIENCES; BIOLOGICAL MATERIALS; QUANTITATIVE CHEMICAL ANALYSIS; GALLIUM; SOLVENT EXTRACTION; SPECTROSCOPY; AIR POLLUTION; COMPLEXES; EXPERIMENTAL DATA; FLUORESCENCE; PARTICULATES; CHEMICAL ANALYSIS; DATA; ELEMENTS; EXTRACTION; INFORMATION; LUMINESCENCE; MATERIALS; METALS; NUMERICAL DATA; PARTICLES; POLLUTION; SEPARATION PROCESSES; 400105* - Separation Procedures; 400102 - Chemical & Spectral Procedures; 500200 - Environment, Atmospheric- Chemicals Monitoring & Transport- (-1989)

Citation Formats

Scott, N, Carter, D E, and Fernando, Q. Separation and determination of parts-per-billion concentrations of gallium in biological materials. United States: N. p., 1987. Web. doi:10.1021/ac00133a021.
Scott, N, Carter, D E, & Fernando, Q. Separation and determination of parts-per-billion concentrations of gallium in biological materials. United States. https://doi.org/10.1021/ac00133a021
Scott, N, Carter, D E, and Fernando, Q. Sun . "Separation and determination of parts-per-billion concentrations of gallium in biological materials". United States. https://doi.org/10.1021/ac00133a021.
@article{osti_6614187,
title = {Separation and determination of parts-per-billion concentrations of gallium in biological materials},
author = {Scott, N and Carter, D E and Fernando, Q},
abstractNote = {Gallium is separated from an aqueous digest of a biological matrix, by the selective extraction of the ion pair GaCl/sub 4//sup -/ x R/sub 4/N/sup +/, into a hexane-methyl isobutyl ketone mixture (R/sub 4/N/sup +/ represents the methyltricaprylammonium ion). The extracted gallium species reacts with the ligand, 1,5-bis(salicylidene)-thiocarbohydrazone, to form a complex that fluoresces at 440 nm when the excitation wavelength is 395 nm. This fluorometric method has been used to determine 0.10-40 ppb of gallium in biological materials with a relative precision of 7%. The principal interferences with the fluorometric method in aqueous solutions are Fe/sup 3 +/, Fe/sup 2 +/, Cu/sup 2 +/, and Zn/sup 2 +/. In the aqueous digest, the Fe/sup 3 +/ is reduced to Fe/sup 2 +/ and the Cu/sup 2 +/ is masked with S/sub 2/O/sub 3//sup 2 -/. The Fe/sup 2 +/ and Zn/sup 2 +/ are not extracted into the organic phase and do not interfere with the fluorometric method.},
doi = {10.1021/ac00133a021},
url = {https://www.osti.gov/biblio/6614187}, journal = {Anal. Chem.; (United States)},
number = ,
volume = 59:6,
place = {United States},
year = {1987},
month = {3}
}