Substoichiometric isotope dilution analysis of iron in biological materials by the 8-quinolinol-extraction

N. Suzuki; S. Nakamura; H. Imura

doi:10.1007/bf02519862

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 57: Issue 1

Substoichiometric isotope dilution analysis of iron in biological materials by the 8-quinolinol-extraction

Authors:

N. Suzuki

N. Suzuki Tohoku University Department of Chemistry, Faculty of Science 980 Sendai (Japan)

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S. Nakamura

S. Nakamura Tohoku University Department of Chemistry, Faculty of Science 980 Sendai (Japan)

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H. Imura

H. Imura Tohoku University Department of Chemistry, Faculty of Science 980 Sendai (Japan)

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Pages:: 37–46

Online Publication Date:: 09 Jan 2007

Publication Date:: 01 Mar 1980

Article Category:: Research Article

DOI:: https://doi.org/10.1007/bf02519862

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Abstract

A highly precise and accurate method for the determination of minor amounts of iron by substoichiometric isotope dilution analysis is described. The constant amount of Fe(III) is substoichiometrically extracted with 2·10⁻⁴M oxine in chloroform from the aqueous phase of pH 9.2–10.0 containing 6·10⁻³M tartrate. The interfering ions such as Mn(II), Co(II), Ni(II), Cu(II), and Zn(II), can be removed by the preliminary extraction of Fe(III) from 7.5M hydrochloric acid solutions into isopropyl ether. The present method has been applied to the determination of iron in biological standard reference materials, i.e., the NBS Spinach (SRM-1570) and the NIES Pepperbush (SRM No. 1), and the results obtained are 548±9 ppm (NBS certified value: 550±20 ppm) and 193±4 ppm, respectively.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)