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1,412 Newest Publications about the topic solution

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Polypropylene membranes with the double sensitivity effect

12-12-2014 | Joanna Wolska, Katarzyna Smolinska‐Kempisty, Marek Bryjak, Wojciech Kujawski, Journal of Applied Polymer Science, 2014

ABSTRACT This article describes the modification of polypropylene membranes leading to the preparation of thermo‐ and pH‐sensitive structures. Poly(N‐isopropylacrylamide), poly(acrylic acid), or copolymer poly(N‐isopropylacrylamide‐co‐acrylic acid) was grafted on to the membranes' surface ...

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Determination of four acidic non‐steroidal anti‐inflammatory drugs in wastewater samples by dispersive liquid–liquid microextraction based on solidification of floating organic droplet and high‐performance liquid chromatography

09-12-2014 | Mihail Simion Beldean‐Galea, Virginia Coman, Didier Thiebaut, Jérome Vial, Journal of Separation Science, 2014

A simple, environmentally friendly and sensitive dispersive liquid–liquid microextraction based on solidification of floating organic droplet for the extraction of four acidic non‐steroidal anti‐inflammatory drugs (ketoprofen, naproxen, ibuprofen and diclofenac) from wastewater samples ...

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Acetylcholinesterase inhibition-based colorimetric determination of Hg2+ using unmodified silver nanoparticles

09-12-2014 | Dashananda Nanda Kumar; Ayyachamy Rajeshwari; Sruthi Ann Alex; Natarajan Chandrasekaran; Amitava Mukherjee, New Journal of Chemistry, 2014

A novel, enzyme-based, indirect detection method for mercury in aqueous solutions has been developed using unmodified silver nanoparticles. The enzyme acetylcholinesterase breaks down acetylthiocholine to thiocholine, which results in the crosslinking of the silver nanoparticles. The presence of ...

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Studies on polymorph conversion in a new cyclodextrin inclusion compound

09-12-2014 | José A. Fernandes; Ana I. Ramos; Paulo Ribeiro-Claro; Filipe A. Almeida Paz; Susana S. Braga, CrystEngComm, 2014

A novel β-cyclodextrin (βCD) inclusion compound was prepared using 4-phenylpyridine-N-oxide (PPNO) as the organic guest. The inclusion compound, βCD·PPNO, was characterised both in solution and in the solid state using numerous techniques. 1H NMR in aqueous solution allowed the determination of a ...

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Determination of copper, nickel, manganese and cadmium ions in aqueous samples by flame atomic absorption spectrometry after simultaneous coprecipitation with Co(OH)2

07-12-2014 | Author(s): Sayed Zia Mohammadi , Tayebeh Shamspur , Yar Mohammad Baghelani, Arabian Journal of Chemistry, 2014

Publication date: Available online 5 December 2014 Source:Arabian Journal of Chemistry Author(s): Sayed Zia Mohammadi , Tayebeh Shamspur , Yar Mohammad Baghelani A separation-preconcentration procedure was developed for determination of trace amounts of copper, nickel, manganese and ...

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Sensors, Vol. 14, Pages 23269-23282: Development of a Molecularly Imprinted Polymer-Based Sensor for the Electrochemical Determination of Triacetone Triperoxide (TATP)

05-12-2014 | Mamo, Samuel Kassahun; Gonzalez-Rodriguez, Jose, Sensors, 2014

The explosive triacetone triperoxide (TATP), which can be prepared from commercially readily available reagents following an easy synthetic procedure, is one of the most common components of improvised explosive devices (IEDs). Molecularly-imprinted polymer (MIP) electrochemical sensors have ...

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Isomorphism and solid solution as shown by an accurate high‐resolution diffraction experiment

03-12-2014 | Agnieszka Poulain, Maciej Kubicki, Claude Lecomte, Acta Crystallographica Section B, 2014

High‐resolution crystal structure determination and spherical and multipolar refinement enabled an organic solid solution of 1‐(4′‐chlorophenyl)‐2‐methyl‐4‐nitro‐1H‐imidazole‐5‐carbonitrile and 5‐bromo‐1‐(4′‐chlorophenyl)‐2‐methyl‐4‐nitro‐1H‐imidazole to be found, which would not normally be ...

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Solution phase post-modification of a trimesic acid network on Au(111) with Zn2+ ions

03-12-2014 | Jaesung Lee; Jandee Kim; Hyeran Kim; Choong Kyun Rhee; Myung-Hwan Whangbo, Chemical Communication, 2014

Solution phase post-modification of a trimesic acid (TMA) network on Au(111) with Zn2+ ions was found to induce transformation of a bar-featured scanning tunneling microscopy image of (5√3 × 5√3) to a chevron-pair image of (10√3 × 10√3). Voltammetric determination of Zn coverage in the modified ...

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Graphene oxide‐based solid phase extraction of vitamin B12 from pharmaceutical formulations and its determination by X‐ray fluorescence

02-12-2014 | Morteza Moradi, Soraya Zenouzi, Kamran Ahmadi, Ali Aghakhani, X-Ray Spectrometry, 2014

In the present study, a novel quantitative method, namely solid phase extraction, was applied to extract vitamin B12 from pharmaceutical formulations. The technique involves the use of graphene oxide (GO) as an efficient adsorbent for solid‐phase extraction of vitamin B12. Collection of GO from ...

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Studies on Polymorph Conversion in a New Cyclodextrin Inclusion Compound

02-12-2014 | Jose Alberto Fernandes; Ana Isabel Ramos; Paulo Ribeiro Claro; Filipe Alexandre Almeida Paz; Susana Santos Braga, CrystEngComm, 2014

A novel β-cyclodextrin (βCD) inclusion compound was prepared using 4-phenylpyridine N-oxide (PPNO) as the organic guest. The inclusion compound, βCD•PPNO, was characterised both in solution and the solid state using numerous techniques. 1H NMR in aqueous solution allowed the determination of a ...

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