NDLI: A new polymeric chromogenic reagent for dual-wavelength spectrophotometric determination of iron(III)

Content Provider	Springer Nature Link
Author	Ma, Hui Min Huang, Yue Xian Liang, Shu Chuan
Copyright Year	1998
Abstract	By condensing chitosan with 7-(4-formyl-phenylazo)-8-quinolinol-5-sulfonic acid (FPAQS), a new polymeric chromogenic reagent C-FPAQS has been synthesized and its properties investigated. In acidic media (pH 2.7), C-FPAQS reacts with iron(III) to yield an orange complex with a molar absorptivity of 2.8 × 104 lmol−1 cm−1 at 420 nm, and in the meantime a negative peak at 524 nm. The apparent molar absorptivity (ε420–524 nm) obtained by dual-wavelength measurements is 7.9 × 104lmol−1cm−1 which is about two times higher than that by single-wavelength measurements at 420 nm Beer's law is obeyed in the range of 0–0.8 μg ml−1 for iron(III). The developed method has been satisfactorily used to determine iron at the 0.03 to 3% (w∶w) level in a nylon-6 and in a soil sample. Compared to the corresponding low-molecular weight FPAQS and other chromogenic reagents, C-FPAQS has not only good sensitivity but also largely increased acid solubility and improved selectivity for iron, which may be explained by the incorporation of FPAQS into an acid-soluble polymer.
Starting Page	181
Ending Page	185
Page Count	5
File Format	PDF
ISSN	00263672
Journal	Microchimica Acta
Volume Number	128
Issue Number	3-4
e-ISSN	14365073
Language	English
Publisher	Springer-Verlag
Publisher Date	1998-01-01
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	polymeric chromogenic reagent N-4-(5-sulfo-8-hydroxyquinolyl-7-azo)benzylidene chitosan dual-wavelength spectrophotometry iron(III) Analytical Chemistry Inorganic Chemistry Physical Chemistry Characterization and Evaluation Materials Monitoring/Environmental Analysis/Environmental Ecotoxicology
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry

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