Analytical Chemistry News

A novel two-photon fluorescent probe for the selective detection of hydrogen peroxide based on a naphthalene derivative

RSC - Anal. Methods latest articles - Thu, 07/06/2017 - 10:17
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01249G, PaperQiu-Juan Ma, Xian Li, Jing Zhang, Xiaoyan Zhu, Liyi Zhou, Hongwen Liu
In this study, we report a novel two-photon fluorescent probe for monitoring hydrogen peroxide. Probe 1 consists of a naphthalene backbone and a boric acid ester which was used as...
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Probing for corticotropin-releasing hormone (CRH) in human blood for doping control purposes using immunoaffinity purification and LC-HRMS/MS

RSC - Anal. Methods latest articles - Thu, 07/06/2017 - 10:17
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01349C, PaperAndre Knoop, Andreas Thomas, Martin Bidlingmaier , Philippe Delahaut, Wilhelm Schanzer, Mario Thevis
Corticotropin-releasing hormone (CRH), a peptide hormone whose secretion leads to adrenal cortisol release, is classified as prohibited substance by the World Anti-Doping Agency (WADA). In order to comprehensively enforce anti-doping...
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Proficiency testing of sampling

RSC - Anal. Methods latest articles - Thu, 07/06/2017 - 09:16

Anal. Methods, 2017, Advance Article
DOI: 10.1039/C7AY90092A, AMC Technical Brief Analytical Methods Committee AMCTB No. 78
General guidelines for the proficiency testing of sampling are required to handle the special complications involved.
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Characterization of suspected dermal fillers containing hyaluronic acid

RSC - Anal. Methods latest articles - Thu, 07/06/2017 - 09:16

Anal. Methods, 2017, Advance Article
DOI: 10.1039/C7AY01130J, PaperCeline Vanhee, Bart Desmedt, Sebastien Baudewyns, Angelique Kamugisha, Melissa Vanhamme, Jean-Luc Bothy, Sona Kovackova, Patricia Courselle, Eric Deconinck
Hyaluronic acid (HA) has important applications in the field of orthopedics, ophthalmology and cosmetics.
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Colorimetric assay for simultaneous detection of Hg2+ and Ag+ based on inhibiting the peroxidase-like activity of core-shell Au@Pt nanoparticles

RSC - Anal. Methods latest articles - Thu, 07/06/2017 - 09:16
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01317E, PaperChi-Fang Peng, Ying-Ying Zhang, Li-Ying Wang, Zheng-Yu Jin, Guang Shao
In this study, peroxidase-mimicking core-shell Au@Pt nanoparticles (Au@Pt NPs) were synthesized, and both Hg2+ and Ag+ were found to intensively inhibit the catalytic activity of Au@Pt NPs. The interactions between...
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A simple and sensitive electrochemical detection of furazolidone based on Au nanoparticles functionalized graphene modified electrode

RSC - Anal. Methods latest articles - Wed, 07/05/2017 - 10:04
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01494E, PaperBaoshan He, Gengan Du
A new sensor using a glassy carbon electrode modified with graphene and Au nanoparticles (Gr/Au/GCE) was designed to investigate the electrochemical behavior of furazolidone (FZD). The morphology and nature of...
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ZnO-RGO modified electrode coupled to microwave digestion for determination of trace cadmium and lead in six species fish

RSC - Anal. Methods latest articles - Wed, 07/05/2017 - 07:02
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01574G, PaperWen Zhang, Yiwei Xu, Xiaobo Zou
A composite of ZnO nanoparticle and reduced graphene oxide (RGO) is employed as sensing interface to constitute a practical electrode for determination of cadmium (Cd2+) and lead (Pb2+). Suspension composing...
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Production and evolution of a ScFv antibody for immunoassay of residual phenothiazine drugs in meat based on computational simulation

RSC - Anal. Methods latest articles - Tue, 07/04/2017 - 07:44
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01103B, PaperFang Shu Shi, Lei Zhang, Wan Qiu Xia, Jing Liu, Hui Cai Zhang, Jian Ping Wang
In this study, the gene of single chain variable fragment (ScFv) from a hybridoma cell strain excreting the monoclonal antibody for 2-chlorophenothiazine was directly transformed into E. coli to express...
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Development and validation of a novel fluorometric sensor for hydrogen peroxide monitoring in exhaled breath condensate

RSC - Anal. Methods latest articles - Mon, 07/03/2017 - 10:32
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01535F, PaperAbolghasem Jouyban, elaheh rahimpour, vahid jouyban, maryam Khoubnasabjafari, Hossein Abdolmohammad-Zadeh
A novel fluorometric sensor based on catalyzed 5-aminosalicylic acid (5-ASA)/H2O2 system was developed to detect trace levels of H2O2 in exhaled breath condensate (EBC). It relies on the oxidative conversion...
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Study of the Performance of a Resolution Criterion to Characterise Complex Chromatograms with Unknowns or Without Standards

RSC - Anal. Methods latest articles - Mon, 07/03/2017 - 08:31
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00399D, PaperJose Antonio Navarro-Huerta, Tamara Alvarez-Segura, Jose Ramon Torres-Lapasio, M. C. C. Garcia-Alvarez-Coque
The search of the best conditions in liquid chromatography is routinely carried out with the information provided by standards. However, there are samples with insufficient knowledge about their chemical composition....
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Efficient extraction of phthalate esters with different polarities from seawater samples using multi-walled carbon nanotubes/graphene oxide nanosheets

RSC - Anal. Methods latest articles - Mon, 07/03/2017 - 08:31
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00806F, PaperKamal Ghanemi, Elaheh Habibi, Arash Larki
In this method, a new adsorbent composed of multi-walled carbon nanotubes (MWCNTs) and graphene oxide (GO) nanosheets was developed. The proposed adsorbent was efficiently extracted six environmentally important phthalate esters...
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Enzymatic digestion as a tool for removing proteinaceous templates from molecularly imprinted polymers

RSC - Anal. Methods latest articles - Mon, 07/03/2017 - 08:31
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01328K, PaperJulia Erdossy, Eszter Kassa, Anita Farkas, Viola Horvath
Proteinaceous templates are often immobilized prior to polymerization in molecular imprinting which usually entails the need for digestion as a tool for subsequent template removal. The efficiency of digestion, however,...
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Simultaneous determination of tricaprylin, DPPG and DEPC in propofol liposome by methyl esterification method and GC-FID analysis

RSC - Anal. Methods latest articles - Mon, 07/03/2017 - 08:31
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00592J, PaperRongwei Yan, Leilei Zhao, Yanfei Li, Yong Zou, Xinjun Xu
As a novel injection preparation, propofol liposome have extensive application prospects in clinical practice, and lipid components in it need to be quantified for quality control. In this study, a...
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Preparation of carbon nanodots capped by polyethylene glycol as a multifunctional sensor for temperature and paracetamol

RSC - Anal. Methods latest articles - Mon, 07/03/2017 - 08:31
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01180F, PaperFei Qu, Fangfang Xue, Jing Liu, Jinmao You
In this paper, a simple and green preparative strategy for synthesizing carbon nanodots (CNDs) is developed by one-pot hydrothermal method, using ascorbic acid (AA) as carbon source and polyethylene glycol...
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Rapid Amino Acid Analysis of Beers Using Flow-gated Capillary Electrophoresis Coupled with Side-by-Side Calibration

RSC - Anal. Methods latest articles - Mon, 07/03/2017 - 08:31
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01267E, PaperQingfu Zhu, Ning Zhang, Maojun Gong
Amino acid analysis is an important procedure to measure free amino acids (AAs) in various samples including proteins, blood plasma, urine, foods and beverages. Due to the complexity of these...
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Determination of pharmaceuticals in freshwater sediments using ultrasonic-assisted extraction with SPE clean-up and HPLC-DAD or LC- ESI-MS/MS detection

RSC - Anal. Methods latest articles - Mon, 07/03/2017 - 08:31
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00650K, PaperOmar S. A. Al-Khazrajy, Alistair BA Boxall
A robust and sensitive analytical method is presented for the extraction and determination of six pharmaceuticals in freshwater sediments. The pharmaceuticals were extracted from sediment using ultrasonic extraction with 2%...
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In situ analysis and real-time monitoring of the decomposition of the 2nd Grubbs catalyst in CH3CN by droplet spray ionization tandem mass spectrometry

RSC - Anal. Methods latest articles - Mon, 07/03/2017 - 08:31
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01150D, PaperJie Jiang, Dandan Zhao, Hong Zhang, Jing He, Na Li
The 2nd Grubbs catalysts are widely used in areas of organic and polymer synthesis. However, relatively little data on the decomposition of the 2nd Grubbs catalysts are available. In this...
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A label-free fluorescence nanosensor for the determination of adrenaline based on graphene quantum dots

RSC - Anal. Methods latest articles - Mon, 07/03/2017 - 08:31
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01271C, PaperMengke Wang, Yan Li, Lei Wang, Xingguang Su
In this paper, graphene quantum dots (GQDs) were employed to design an effective and simple fluorescence biosensor for the detection of adrenaline (AD). AD could quench the fluorescence of GQDs...
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Alternative method for lactulose quantification in the presence of lactose in milk using HILIC with refractive index detection

RSC - Anal. Methods latest articles - Mon, 07/03/2017 - 08:31
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00890B, PaperLeandra Natalia de Oliveira Neves, Rafael Guzella de Carvalho, Jair Aguiar, Paulo Henrique Fonseca da Silva
An alternative chromatographic method by HILIC-RID has been developed for lactulose quantification in the presence of lactose in milk samples. Eighteen commercial UHT milk samples were analyzed. The best separation...
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Secondary electrospray ionization proceeds via gas-phase chemical ionization

RSC - Anal. Methods latest articles - Mon, 07/03/2017 - 06:30

Anal. Methods, 2017, Advance Article
DOI: 10.1039/C7AY01121K, PaperAlberto Tejero Rioseras, Martin Thomas Gaugg, Pablo Martinez-Lozano Sinues
The proton transfer reaction in secondary electrospray ionization ultimately proceeds with gas-phase ions.
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