FLUORESCENCE ENHANCEMENT OF Al3+– SODIUM MORIN–5–SULFONATE COMPLEX BY IMIDAZOLIUM IONIC LIQUID AND ITS APPLICATION IN DETERMINATION OF Al3+ IONS IN AN AQUEOUS SOLUTION

This study describes the preparation of sodium morin–5–sulfonate (NaMSA) as a new reagent for the determination of aluminium(III) (Al3+) ions based on the formation of a ternary complex. The complex consists of Al3+, NaMSA, and 1–Butyl–3–methylimidazolium hexafluorophosphate (BMIM–PF6). It was found that this method was sensitive compared to the binary complex of Al3+ and NaMSA. The ternary complex was excited at 420 nm, and the fluorescence signal was measured at 518 nm. Maximum fluorescence signal produced at pH 5.0 (acetic acid–acetate buffer), with 0.02% v/v BMIM–PF6 and 1.0 × 10-4 molL-1 of NaMSA. The calibration graph in linear up to 10 mgL-1 with the calculated detection limit of 0.017 mgL-1. Effect of foreign ions towards the ternary complex was also studied. Finally, the method was applied in the determination of Al3+ ions in water samples, and satisfactory results were obtained.

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Fluorescence Enhancement of Europium(III) Perchlorate by 2,2′-Dipyridyl on Bis(benzylsulfinyl)methane Complex

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.634-638.2462 ◽

2013 ◽

Vol 634-638 ◽

pp. 2462-2465

Author(s):

Wen Xian Li ◽

Bo Yang Ao ◽

Jing Zhang

Keyword(s):

Rare Earth ◽

Ternary Complex ◽

Fluorescence Enhancement ◽

Fluorescence Emission ◽

Europium Complex ◽

New Method ◽

Rare Earth Complexes ◽

Fluorescence Properties ◽

Binary Complex ◽

Fluorescence Lifetimes

A novel ligand with double sulfinyl groups, bis(benzylsulfinyl)methane L, was synthesized by a new method. Its novel ternary complex, has been synthesized [using L as the first ligand, and dipyridyl L' as the second ligand]. In order to study the effect of the second ligand on the fluorescence properties of rare-earth sulfoxide complex, a novel binary europium complex has been synthesized. Photoluminescent measurement showed that the first ligand L could efficiently transfer the energy to Eu (III) ions in the complex. Furthermore, the detailed luminescence analyses on the rare earth complexes indicated that the ternary Eu (III) complex manifested stronger fluorescence intensities, longer lifetimes, and higher fluorescence quantum efficiencies than the binary Eu (III) materials. The fluorescence emission intensities and fluorescence lifetimes of the ternary complex enhanced more obviously than the binary complex.

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Nitroso-R-salt as a sensitive spectrophotometric reagent for the determination of paracetamol in pharmaceutical preparations

Baghdad Science Journal ◽

10.21123/bsj.6.3.570-577 ◽

2009 ◽

Vol 6 (3) ◽

pp. 570-577

Author(s):

Baghdad Science Journal

Keyword(s):

Aqueous Solution ◽

Statistical Difference ◽

Pharmaceutical Preparations ◽

Molar Absorptivity ◽

Calibration Graph ◽

Subsequent Reaction ◽

Experimental Conditions ◽

Colored Complex ◽

British Pharmacopoeia

Nitroso-R-salt is proposed as a sensitive spectrophotometric reagent for the determination of paracetamol in aqueous solution. The method is based on the reaction of paracetamol with iron(III) and subsequent reaction with nitroso-R-salt to yield a green colored complex with maximum absorption at 720 nm. Optimization of the experimental conditions was described. The calibration graph was linear in the concentration range of 0.1 – 2.0 ?g mL-1 paracetamol with a molar absorptivity of 6.9 × 104 L mol-1 cm-1. The method was successfully applied to the determination of paracetamol in pharmaceutical preparations without any interference from common excipients. The method has been statistically evaluated with British Pharmacopoeia method and no statistical difference between methods was found at the 95% confidence level.

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A highly selective and sensitive fluorescent chemosensor for Hg2+ based on a pyridine-appended π-conjugated ligand

RSC Advances ◽

10.1039/c4ra07448c ◽

2014 ◽

Vol 4 (87) ◽

pp. 47000-47004 ◽

Cited By ~ 9

Author(s):

Yaping Yang ◽

Xin-Long Ni ◽

Tao Sun ◽

Hang Cong ◽

Gang Wei

Keyword(s):

Aqueous Solution ◽

Organic Synthesis ◽

Fluorescence Enhancement ◽

Fluorescent Chemosensor ◽

Selective Method ◽

Pure Aqueous Solution

A sensitive and selective method for the determination of Hg2+ cations by fluorescence enhancement in pure aqueous solution was developed and obtained by simple organic synthesis.

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Determination of Plant Hormone Indole-3-Acetic Acid in Aqueous Solution

Electroanalysis ◽

10.1002/elan.201200394 ◽

2012 ◽

Vol 25 (1) ◽

pp. 303-307 ◽

Cited By ~ 6

Author(s):

Jana Bulíčková ◽

Romana Sokolová ◽

Stefania Giannarelli ◽

Beatrice Muscatello

Keyword(s):

Aqueous Solution ◽

Acetic Acid ◽

Plant Hormone ◽

Indole 3 Acetic Acid

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Determination of Carbaryl Residues in Honey Bees

Journal of AOAC INTERNATIONAL ◽

10.1093/jaoac/48.4.771 ◽

1965 ◽

Vol 48 (4) ◽

pp. 771-774

Author(s):

D P Johnson ◽

H A Stansbury

Keyword(s):

Aqueous Solution ◽

Acetic Acid ◽

Quantitative Determination ◽

Honey Bees ◽

Methylene Chloride ◽

Hydrolysis Product ◽

Separate Analysis ◽

Yellow Substance ◽

Hydrolysis Of

Abstract A method has been developed for detecting residues of carbaryl (1-naphthyl methylcarbamate) as well as its hydrolysis product, 1-naphthol, in dead bees. The method is based on extraction of the bees with benzene, followed by a cleanup involving liquid partitioning and chromatography on Florisil. The quantitative determination involves hydrolysis of carbaryl to 1-naphthol and coupling of the latter with p-nitrobenzenediazonium fluoborate in acetic acid to form a yellow substance. For separate analysis, free 1-naphthol is separated from methylene chloride into a basic aqueous solution. The sensitivity of the method is about 0.1 ppm; recoveries averaged 85.6 ± 6.6% for 1- naphthol and 83.8 ± 2.7% for carbaryl.

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