2,6-Diamino-1-N-methylpyrimidine as new fluorescent probe for palladium(II) determination using hyphenated technique

The selective and sensitive hyphenated technique for Pd(II) fluorescence and spectrophotometric determination was proposed. The procedure was based on preliminary solid-phase extraction of [PdCl4]2− onto silica modified with quaternary ammonium salts, with the subsequent elution from the surface by 2,6-diamino-1- N-methylpyrimidine solution and measurement of the fluorescence intensity. The luminescence enhancement effect of 2,6-diamino-1- N-methylpyrimidine in the presence of Pd(II) due to the complex formation was applied to the development of sorption-spectroscopic techniques for detecting trace amounts of palladium in solution.

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Corncob Waste Based Adsorbent for Solid Phase Extraction of Tartrazine in Carbonated Drinks and Analytical Method using Ultra Performance Liquid Chromatography-Mass Spectrometry

Current Analytical Chemistry ◽

10.2174/1573411015666191028113257 ◽

2020 ◽

Vol 16 (7) ◽

pp. 924-932

Author(s):

Yasmeen Mutlaq Ghazi Al Shamari ◽

Saikh Mohammad Wabaidur ◽

Abdulrahman Abdullah Alwarthan ◽

Moonis Ali Khan ◽

Masoom Raza Siddiqui

Keyword(s):

Mass Spectrometry ◽

Liquid Chromatography ◽

Solid Phase Extraction ◽

Solid Phase ◽

Cost Effective ◽

Ultra Performance Liquid Chromatography ◽

Phase Extraction ◽

Food Dye ◽

Hyphenated Technique

Background : A new method has been developed for the determination of food dye tartrazine in soft drinks. Tartrazine is determined by hyphenated technique Ultra Performance Liquid Chromatography coupled with Mass spectrometry. The solid-phase extraction was used for the extraction of tartrazine. Methods: For the LC-MS analysis of tartrazine acetonitrile, water (80:20) was used as a mobile phase whereas, the C-18 column was selected as the stationary phase. The chromatographic run was allowed for 1 min. The adsorbent of the solid-phase extraction was synthesized from the waste corn cob. Results: Method found to be linear in the range of 0.1 mg L-1 - 10 mg L-1, limits of detection and quantitation were found to be 0.0165 mgL-1 and 0.055 mgL-1, respectively. Tartrazine, in the real sample, was found to be 20.39 mgL-1 and 83.26 mgL-1. Conclusion: The developed UPLC-MS method is rapid, simple, precise and can be used for the quantitative analysis of tartrazine. The solid-phase extraction also involves a cost-effective procedure for extraction as it does not involve the commercial cartridge.

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Solid-Phase Extraction for the Decontamination of Alkali Metal, Alkaline Earth Metal, and Ammonium Salts from Heavy Metal Ions

Journal of Colloid and Interface Science ◽

10.1006/jcis.2001.7990 ◽

2002 ◽

Vol 246 (2) ◽

pp. 263-269 ◽

Cited By ~ 14

Author(s):

Mitali Sarkar ◽

Mridula Das ◽

Pradip Kumar Datta

Keyword(s):

Heavy Metal ◽

Alkali Metal ◽

Solid Phase Extraction ◽

Heavy Metal Ions ◽

Alkaline Earth ◽

Solid Phase ◽

Earth Metal ◽

Ammonium Salts ◽

Alkaline Earth Metal ◽

Phase Extraction

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The composition of complexes in the organic phase during the extraction of Eu(III) and Am(III) by benzyldibutylamine and benzyltrialkylammonium nitrates

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19860791 ◽

1986 ◽

Vol 51 (4) ◽

pp. 791-800

Author(s):

Libor Kuča ◽

Věra Jedináková ◽

Lubomír Daňo

Keyword(s):

Metal Complex ◽

Organic Phase ◽

Quaternary Ammonium Salts ◽

Ammonium Salts ◽

Phase Extraction ◽

Salting Out ◽

Nitrate Ions ◽

Nitrate Complexes ◽

Composition Of Complexes ◽

Nitrate Solutions

The extraction of americium and europium from acid nitrate solutions by benzene solutions of benzyldibutylamine nitrate (I) and quaternary ammonium salts benzyllauryldimethylammonium nitrate (II) and benzyltrioctylammonium nitrate (III) has been studied. During extraction with I, {(R3NH+)2, Me(NO3)2-5} is formed in the organic phase, extraction with II yields {(R4N+), Me(NO3)-4} and {(R4N+)2, Me(NO3)2-5} is formed during extraction with III. The concentration of nitrate ions does not have an unambiguous effect on the stoichiometry of the extraction. In addition to favouring the formation of the nitrate complexes of Am3+ and Eu3+, which are extracted by amines, nitrate ions also have a nonspecific salting out effect. The changes in the water content in the organic phase in dependence on the concentration of the metal complex suggests that the complex of Eu with II is not hydrated in the organic phase.

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Simultaneous determination of Pb and Cd in seafood by ICP OES with on-line pre-concentration by solid phase extraction with amberlite XAD-4 after complex formation with DDTP

Brazilian Archives of Biology and Technology ◽

10.1590/s1516-89132013000100017 ◽

2013 ◽

Vol 56 (1) ◽

pp. 127-134 ◽

Cited By ~ 5

Author(s):

Éder José dos Santos ◽

Arlene Bispo dos Santos ◽

Amanda Beatriz Herrmann ◽

Suzete Kulik ◽

Loana Mara Baika ◽

...

Keyword(s):

Complex Formation ◽

Solid Phase Extraction ◽

Simultaneous Determination ◽

Solid Phase ◽

Phase Extraction ◽

Icp Oes ◽

On Line

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Intercalation of Montmorillonite by Interlayer Adsorption and Complex Formation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.29-30.295 ◽

2007 ◽

Vol 29-30 ◽

pp. 295-298 ◽

Cited By ~ 1

Author(s):

Muthu Pannirselvam ◽

R.K. Gupta ◽

S.N. Bhattacharya ◽

Robert A. Shanks

Keyword(s):

Complex Formation ◽

Quaternary Ammonium Salts ◽

Ammonium Salts ◽

Future Research ◽

Organic Substances ◽

Isomorphous Replacement ◽

Cloisite 30B ◽

Long Time ◽

Clay Layers ◽

Ether Alcohol

Clays are essentially composed of crystalline particles of one or more members of a small group of minerals. The ability of clays to intercalate certain organic substances has been known for a very long time. There is a scope in these clay structures for isomorphous replacement, that is, for substitution of Na+ by cations of similar size but usually of lower valency. This research aims at identifying suitable additives for pretreatment of clay and determining the effect of different classes of compounds (intercalants) on the d-spacing expansion of clay layers. This paper addresses a different approach to ion exchange for treatment of sodium montmorillonite, with different functional groups: aldehyde, ether, alcohol, glycol, and stearates. The results were compared with commercially available clays, Cloisite 25A and Cloisite 30B (Southern Clay Products), which are montmorillonite (MMT) clays intercalated with quaternary ammonium salts. The d-spacing increment in this research was consistent with the d-spacing achieved in commercially available clays. Future research will be to utilize the treated clay to produce polymer composites.

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