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Spectrophotometric Method for Determination of Chromium Ion in Aqueous Solution Using ninhydrin

American Journal of Analytical Chemistry 2022年第10期13卷 382-398页

作者： Hutaf Mustafa Baker Tiba Dheyaa Rahoomi Hamzeh Abdel-Halim Department of Chemistry Faculty of Science Al Al-Bayt University Mafraq Jordan Department of Chemistry Hashemite University Zarqa Jordan

A simple, precise, inexpensive and reproducible spectrophotometric method was investigated for the determination of chromium ion (III) in aqueous media, this method based on the formation of a complex between chromium ion (III) and ninhydrin, a deep greenish-violet colored product in the presence of potassium hydroxide was obtained. The absorption of this product was measured at λmax = 375 nm. The reaction proceeds quantitatively at room temperature. The linear calibration curve was constructed over range of (4.8 × 10-4 - 1.6 × 10-2) mol/L of chromium ions with molar absorptivity of 2.90 × 102 and correlation coefficient R2 = 0.9989. The calculated Sandell’s sensitivity value is 0.179 μg/cm2, the limits of detection (LOD) and the limit of quantification (LOQ) are found to be 3.74 × 10-5 and 1.24 × 10-4 mol/L, respectively. The method was successfully applied for determination of the chromium ion in aqueous solution. The stoichiometry of the reactions was determined molar combining ratio of 1:2 between chromium and ninhydrin.

关键词： ninhydrin Chromium Ions Spectroscopy Stoichiometry

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Improved speciation of dissolved organic nitrogen in natural waters: amide hydrolysis with fluorescence derivatization

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Journal of Environmental Sciences 2008年第10期20卷 1273-1280页

作者： Ryan L.Fimmen Tamara D.Trouts Daniel D.Richter Jr. Dharni Vasudevan School of Earth Sciences The Ohio State University 125 S.Oval MallColumbus OH 43210 USA.Nicholas School of the Environment and Earth Sciences Duke University Durham NC 27708 USA School of Earth Sciences The Ohio State University 125 S.Oval MallColumbus OH 43210 USA Nicholas School of the Environment and Earth Sciences Duke UniversityDurham NC 27708 USA. Nicholas School of the Environment and Earth Sciences Duke UniversityDurham NC 27708 USA.Department of Chemistry Bowdoin CollegeBrunswick ME 04011 USA

The objective of this study was to improve primary-amine nitrogen (1°-N) quantification in dissolved organic matter (DOM) originating from natural waters where inorganic forms of N, which may cause analytical interference, are commonly encountered. Efforts were targeted at elucidating organic-N structural criteria influencing the response of organic amines to known colorimetric and fluorescent reagents and exploring the use of divalent metal-assisted amide hydrolysis in combination with fluorescence analyse...

关键词： dissolved organic matter/nitrogen (DOM/DON) o-phthaldialdehyde fluorescamine ninhydrin amino acids amide hydrolysis peptides

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Molecular Diversity of Three-Component Reaction of β-Enamino Imide, Malononitrile and Cyclic α-Diketones

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Chinese Journal of Chemistry 2017年第9期35卷 1422-1430页

作者： Man Xiao Chaoguo Yan College of Chemistry & Chemical Engineering Yangzhou University Yangzhou Jiangsu 225002 China

The base promoted three-component reaction of β-enamino imide, malononitrile and various cyclic α-diketones in acetonitrile showed interesting molecular diversity. The reactions with acenaphthylene-1,2-dione and ninhydrin afforded functionalized spiro[indene-2,4＇-pyrrolo[3,4-b]pyridines] and spiro[acenaphthylene-1,4＇-pyrrolo[3,4-b]- pyridines] in good yields. The similar reaction of phenanthrene-9,10-dione resulted in the formation of the unexpected complex phenanthro[9＇, 10＇：4,5]furo[2,3-c]pyrrolo[3,4-b]pyrroles in satisfactory yields.

关键词： multicomponent reaction β-enamino imide spiro compound ninhydrin phenanthrene-9,10-dione

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A regioselective synthesis of pentacyclic compounds containing coumarin,pyrrole,indene without catalysts under microwave irradiation

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Chinese Chemical Letters 2016年第10期27卷 1622-1625页

作者： Zhi-Wei Chen Jun-Bo Hou Zhao-Ran Dai Xiao-Feng Yang Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education College of Pharmaceutical SciencesZhejiang University of Technology

A concise and efficient approach was developed for the synthesis of pentacyclic compounds containing coumarin, pyrrole, indene in a regioselective manner in good yields via the reactions of N-substituted 4- aminocouma... 详细信息

关键词： 4-Aminocoumarin Catalyst-free ninhydrin Regioselective Annulation

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Separation of Amino Acids Based on Thin-Layer Chromatography by a Novel Quinazoline Based Anti-Microbial Agent

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American Journal of Analytical Chemistry 2012年第9期3卷 669-674页

作者： Supriti Sen Sandipan Sarkar Pijush Kundu Subrata Laskar Department of Chemistry The University of Burdwan Golapbag India

A newly designed quinazoline based compound, 6-pyridin-2-yl-5,6-dihydro-benzo[4,5]imidazo[1,2-c] quinazoline (PDBIQ) has shown the ability for the easy detection of nineteen amino acids on thin-layer chromatography plates as a spray reagent. This new reagent enabled to produce various distinguishable colors with amino acids with different RF values. The detection limits and the binding ability of PDBIQ with amino acids have been calculated. PDBIQ is also able to detect aminoacids from hydrolised seed protein. The title compound also exhibited profound inhibitory action against some gm (+ve) and gm (-ve) bacterial organisms. This paper deals with synthesis, spectroscopic application and biological evaluation of the organic moity.

关键词： Thin-Layer Chromatography Amino Acid ninhydrin Binding Constant Antimicrobial Property

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