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HERO ID
4240324
Reference Type
Journal Article
Title
Gravimetric determination of nickel with quinoxaline-2,3-dithiol by precipitation from homogeneous solution
Author(s)
Dalziel, JA; Slawinski, AK
Year
1968
Is Peer Reviewed?
1
Journal
Talanta
ISSN:
0039-9140
EISSN:
1873-3573
Volume
15
Issue
12
Page Numbers
1385-1389
Language
English
PMID
18960444
DOI
10.1016/0039-9140(68)80198-5
Abstract
The investigation of quinoxaline-2,3-dithiol as a gravimetric reagent for nickel is described. A derivative of the dithiol, S-2-(3-mercaptoquinoxalinyl)thiuronium chloride is used as a generating agent in a PFHS method because of its relative stability and solubility in aqueous ethanol. Nickel, 2.5-25.0 mug, can be precipitated at pH 2-3 as (C(8)H(5)N(2)S(2))(2)Ni. After filtration the precipitates are washed first with aqueous ethanol to remove traces of absorbed reagent and then with benzene to remove a small amount of decomposition product of the reagent, the characterization of which is described. The precipitates are stable and can be dried in air at 110-120 degrees . Errors of less than 0.15 % are obtained in the analysis of solutions containing 25 mg of nickel. The selectivity of the reagent is discussed and some suggestions are made for masking the interference of other elements.
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PFAS
•
Additional PFAS (formerly XAgency)
•
PFAS 150
Literature Search Update December 2020
PubMed
Literature Search August 2019
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Perfluorohexanesulfonic acid
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PFHxS
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