ICCAS OpenIR
A new polymeric chromogenic reagent for dual-wavelength spectrophotometric determination of iron(III)
Ma, HM; Huang, YX; Liang, SC
1998
Source PublicationMIKROCHIMICA ACTA
ISSN0026-3672
Volume128Issue:3-4Pages:181-185
AbstractBy condensing chitosan with 7-(4-formylphenylazo)-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 x 10(4) l mol(-1) cm(-1) at 420 nm, and in the meantime a negative peak at 524 nm. The apparent molar absorptivity (epsilon(420-524 nm)) obtained by dual-wavelength measurements is 7.9 x 10(4) l mol(-1) cm(-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 mu g 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.
KeywordPolymeric Chromogenic Reagent N-4-(5-sulfo-8-hydroxyquinolyl-7-azo)Benzylidene Chitosan Dual-wavelength Spectrophotometry Iron(Iii)
Indexed BySCI
Language英语
WOS IDWOS:000071438000006
PublisherSPRINGER-VERLAG WIEN
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/74224
Collection中国科学院化学研究所
Corresponding AuthorMa, HM
AffiliationChinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Ma, HM,Huang, YX,Liang, SC. A new polymeric chromogenic reagent for dual-wavelength spectrophotometric determination of iron(III)[J]. MIKROCHIMICA ACTA,1998,128(3-4):181-185.
APA Ma, HM,Huang, YX,&Liang, SC.(1998).A new polymeric chromogenic reagent for dual-wavelength spectrophotometric determination of iron(III).MIKROCHIMICA ACTA,128(3-4),181-185.
MLA Ma, HM,et al."A new polymeric chromogenic reagent for dual-wavelength spectrophotometric determination of iron(III)".MIKROCHIMICA ACTA 128.3-4(1998):181-185.
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