Analytical Chemistry News

Graphene oxide-ZnO nanocomposite modified electrode for the detection of phenol

RSC - Anal. Methods latest articles - Wed, 01/03/2018 - 11:15

Anal. Methods, 2018, Advance Article
DOI: 10.1039/C7AY02650A, PaperTanvir Arfin, Stephy N. Rangari
In the present study, a ZnO functionalized graphene oxide (GO) modified glassy carbon electrode (GO-ZnO/GCE) was used for the electrochemical sensory detection of phenol.
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Quantitative analysis of glyphosate, glufosinate and AMPA in irrigation water by in situ derivatization - dispersive liquid-liquid microextraction combined with UPLC-MS/MS

RSC - Anal. Methods latest articles - Wed, 01/03/2018 - 07:05
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02722B, PaperEdgar Pinto, Antonio Gomes Soares, I. M. P. L. V. Ferreira
A novel method was developed for the sensitive, cheap and fast quantitation of glyphosate, glufosinate and aminomethylphosphonic acid (AMPA) in irrigation water by in-situ derivatization and dispersive liquid-liquid extraction (DLLME)...
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Electrochemical impedance spectroscopy of blood. Part 2: numerical analysis of experimental dielectric spectra using the biconcave shape of human erythrocytes

RSC - Anal. Methods latest articles - Wed, 01/03/2018 - 06:04

Anal. Methods, 2018, 10,168-179
DOI: 10.1039/C7AY01692A, PaperA. Zhbanov, S. Yang
Results reported in the companion paper (Zhbanov and Yang, Anal. Methods, 2017, 17, 3302) showed that electrochemical impedance spectroscopy is a highly promising tool for the analysis of blood.
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Carbon nitride quantum dots enhanced-chemiluminescence of hydrogen peroxide and hydrosulfite and its application in ascorbic acid sensing

RSC - Anal. Methods latest articles - Wed, 01/03/2018 - 04:00
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02777J, PaperBing Chen, Feifei Wang, Wensong Yao, Zhen Lin, Xiaomin Zhang, Shu Luo, Linlin Zheng, Xinhua Lin
Weak chemiluminescent (CL) reaction of hydrogen peroxide and hydrosulfite was greatly enhanced by carbon nitride quantum dots (g-CNQDs). CL experiments and electron spin resonance (ESR) investigation indicated that g-CNQD increased...
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ATR-FTIR spectroscopy with chemometric algorithms of multivariate classification in the discrimination between clinical samples Healthy vs Dengue vs Chikungunya vs Zika

RSC - Anal. Methods latest articles - Wed, 01/03/2018 - 04:00
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02784B, Technical NoteMarfran Santos, Yasmin Nascimento, Joelma Monteiro, Brenda Alves, Marilia Melo, Anne Paiva, Hannaly Pereira, Leandro Medeiros, Ingryd Morais, Joao Neto, Jose Fernandes, Joselio Galvao, K. M. G. de Lima
Dengue, Zika and Chikungunya are arboviruses transmitted by mosquitoes of the genus Aedes. In clinical diagnostic routines, cross reactions between Dengue and Zika may occur because they are viruses of...
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Enhanced electrochemiluminescence of luminol by in situ silver nanoparticles decorated graphene dot for glucose analysis

RSC - Anal. Methods latest articles - Wed, 01/03/2018 - 04:00
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02375H, PaperFoad Salehnia, Morteza Hosseini, Mohammad Reza Ganjali
A rapid, linker free, single-step strategy for in situ synthesis of graphene quantum dot-Luminol-Ag nanoparticle (GQD-Luminol-AgNPs) nano-composites was designed by reducing AgNO3 with electrochemiluminescent reagent luminol in the presence of...
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Preparation of an anti-formoterol monoclonal antibody for indirect competitive ELISA detection of formoterol in urine and pork samples

RSC - Anal. Methods latest articles - Tue, 01/02/2018 - 05:43
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02562A, PaperChunsheng Li, Yujing Li, Yan Zhang, Jingjing Liu, Junhua Li, Meng Wu, Haiyan Liu, Zhencai Yang
In this study, an enzyme-linked immunosorbent assay (ELISA) was established to detect formoterol (FMT) residue in pork and urine samples. A monoclonal antibody (mAb) against FMT was prepared using hybridoma...
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A novel paper based colorimetric assay for the detection of TiO2 nanoparticles

RSC - Anal. Methods latest articles - Tue, 01/02/2018 - 05:43

Anal. Methods, 2018, Advance Article
DOI: 10.1039/C7AY02700A, CommunicationGonca Bulbul, Hamed Eskandarloo, Alireza Abbaspourrad
In this communication, we propose a new paper-based platform functionalized with methylene blue (MB) for the detection and removal of titanium dioxide nanoparticles (TiO2 NPs).
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An easily prepared graphene oxide-ionic liquid hybrid nanomaterial for micro-solid phase extraction and preconcentration of Hg in water samples

RSC - Anal. Methods latest articles - Tue, 01/02/2018 - 05:43

Anal. Methods, 2018, Advance Article
DOI: 10.1039/C7AY02201H, PaperAnnaly Cruz Sotolongo, Estefania M. Martinis, Rodolfo G. Wuilloud
High retention of Hg and sensitive determination with a graphene oxide-ionic liquid hybrid nanomaterial.
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A new solidified effervescent tablet-assisted dispersive liquid-liquid microextraction for the analysis of fungicides in fruit juice samples

RSC - Anal. Methods latest articles - Tue, 01/02/2018 - 05:43

Anal. Methods, 2018, Advance Article
DOI: 10.1039/C7AY02406A, PaperElif Y[i without dot]ld[i without dot]z, Hasan Cabuk
A simple and rapid pretreatment method based on effervescent tablet-assisted dispersive liquid-liquid microextraction was introduced for the determination of three fungicides (azoxystrobin, chlorothalonil, and cyprodinil) in fruit juice samples followed by liquid chromatography-ultraviolet detection.
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Layer-by-layer fabrication of g-C3N4 coating for headspace solid-phase microextraction of food additives followed by gas chromatography-flame ionization detection

RSC - Anal. Methods latest articles - Tue, 01/02/2018 - 04:42

Anal. Methods, 2018, Advance Article
DOI: 10.1039/C7AY02515G, PaperYixin Yang, Peige Qin, Xiaoting Zhang, Jiahua Niu, Shufang Tian, Minghua Lu, Jinhua Zhu, Zongwei Cai
With graphitic carbon nitride (g-C3N4) as an SPME fiber coating, a headspace SPME-GC was developed for the analysis of food additives.
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Electrochemical Immunosensor Detection of Tumor Markers based on GO Composite Nanoprobe for Signal Amplification

RSC - Anal. Methods latest articles - Tue, 01/02/2018 - 03:41
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02932B, PaperJing Wang, Dongcheng Yang, Mifa Chen, Beifang Liu, Hou Chen, Hui Xu, Wenxiang Wang, Liangjiu Bai
A novel strategy based on nanoprobes for signal amplification was introduced in electrochemical immunoassay platform. The nanoprobes based on poly(2-hydroxyethyl methacrylate)-r-poly(acrylic acid) (PHEMA-r-PAA) and graphene oxide (GO) have the effect...
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mRMR-based wavelength selection for NIRS quantitative detection of Chinese yellow wine

RSC - Anal. Methods latest articles - Tue, 01/02/2018 - 03:41
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02488F, PaperLingyi Chen, Zhonggai Zhao, Fei Liu
Wavelength selection plays an important role in the analysis of near-infrared(NIR) spectroscopy.This paper introduces the minimal-redundancy-maximal-relevance(mRMR) algorithm into NIR analysis for wavelength selection, by which relevance between spectrum and target...
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Magnetic-based SERS approach for highly sensitive and reproducible detection of cancer-related serum microRNAs

RSC - Anal. Methods latest articles - Tue, 01/02/2018 - 03:41
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02727C, PaperHao Zhang, Chaopeng Fu, Yu Yi, Xiangdong Zhou, Chun-Hui Clayton ZHOU, Guoqing Ying, Youqing Shen, Yifeng Zhu
This paper describes the combination of silica-coated, analyte-tagged gold nanoparticles (SA@GNPs) and gold-coated paramagnetic nanoparticles (Au@MNPs) in a sandwich assay for surface enhanced Raman scattering (SERS) detection of cancer-related serum...
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Synergetic improvement of mechanical properties and surface activities in [gamma]-irradiated carbon fibers revealed by radial positioning spectroscopy and mechanical model

RSC - Anal. Methods latest articles - Tue, 12/26/2017 - 20:31
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02852K, PaperMingjing Shan, Haibo Wang, Zhiwei Xu, Nan Li, Cheng Chen, Jie Shi, Liangsen Liu, Liyun Kuang, Meijun Ma, Ce Zhang
The relationship between microstructures, surface activities and mechanical properties of [gamma]-irradiated carbon fibers had been evaluated quantitatively. X-ray photoelectron spectroscopy combined with argon ion sputtering indicated that outer-surface part (~10nm)...
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Universal Method for Determination of Polysorbate80 in Monoclonal Antibodies and Novel Protein Therapeutic Formulations

RSC - Anal. Methods latest articles - Tue, 12/26/2017 - 06:51
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02537H, PaperVeerendra Koppolu, Bhargavi Vemulapalli, Jason Thomas, Sheau-Chiann Wang, Jon Borman
An evaporative light scattering detector (ELSD) based HPLC method that requires minimal sample preparation has been developed to quantitate polysorbate 80 (PS80) in therapeutic proteins. The method utilizes a mixed-mode...
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Sensitive determination of L-hydroxyproline in dairy products by capillary electrophoresis with in-capillary optical fiber light-emitting diode-induced fluorescence detection

RSC - Anal. Methods latest articles - Tue, 12/26/2017 - 04:47
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02356A, PaperHongyun Ji, Xueyan Zhang, Feng Yang, Jiali Wang, Hongyan Yuan, Dan Xiao
Hydrolyzed leather proteins has been used by some illegal dairy industries to add into dairy products to increase the protein contents in the last few years. As a specific amino...
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Modeling the response of control-released ion-selective electrode and employing it for the study of permanganate oxidation kinetics

RSC - Anal. Methods latest articles - Tue, 12/26/2017 - 03:44
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02735D, PaperDean Song, Rongning Liang, Xiaohua Jiang, Huiqing Sun, Fanyu Kong, Bo Lv, Qiannan Fang, Wei Qin
Although polymeric membrane ion-selective electrodes (ISEs) based on outward ion fluxes have been found analytical useful, there is still a lack of theoretical framework for such detection system. In this...
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Determination of ultra-trace cobalt in water and wheat flour samples using cloud point extraction coupled with laser thermal lens spectrometr

RSC - Anal. Methods latest articles - Tue, 12/26/2017 - 03:44
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02522J, PaperQuan Han, Yanyan Huo, Xiaohui yang, Yaping He, JIang Yan Wu, Hongli Cai
A highly sensitive method for the determination of ultra-trace levels of cobalt using cloud point extraction (CPE) coupled with thermal lens spectrometry was proposed. It is based on the complexation...
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First HPLC method for the simultaneous quantification of levetiracetam, zonisamide, lamotrigine, pentylenetetrazole and pilocarpine in rat plasma and brain

RSC - Anal. Methods latest articles - Tue, 12/26/2017 - 02:43
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02602A, PaperBeatriz M. Fonseca, Marcio Rodrigues, Alves Gilberto
A new high-performance liquid chromatography-diode-array detection (HPLC-DAD) method is herein reported for the first time for the simultaneous determination of three antiepileptic drugs (AEDs) [levetiracetam (LEV), zonisamide (ZNS) and lamotrigine...
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