Analytical Chemistry News

A novel dual targets simultaneous chemiluminescence signal amplification strategy for enhancing the sensitivity of multiple biomolecules detection

RSC - Anal. Methods latest articles - Wed, 11/15/2017 - 06:35
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02102J, PaperJian Li, Jingjin Zhao, Shuting Li, Liangliang Zhang, Chuanqing Lan, Yong Huang, Shulin Zhao
The disease markers detection plays an important role in clinical application. However, rapid, low-cost and simultaneous detection of multiple trace disease markers remain a challenge because of their low abundance....
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Self-supported electrochemical sensor for simultaneously sensitive detection of trace heavy metal ions based on PtAu alloy/carbon nanofibers

RSC - Anal. Methods latest articles - Wed, 11/15/2017 - 03:33
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02223A, PaperSongge Zhang, Han Zhu, Piming Ma, Fang Duan, Weifu Dong, MingLiang Du
The key issue in efficient electrochemical detection of trace heavy metal ions (HMI) is to design hierarchical nanostructure electrode with sensitivity and low detection limit. In this work, a bimetallic...
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Towards improved quantitative analysis using surface-enhanced Raman scattering incorporating internal isotope labelling

RSC - Anal. Methods latest articles - Wed, 11/15/2017 - 03:33
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02527K, PaperAbdu Subaihi, Yun Xu, Howbeer Muhamadali, Shaun Mutter, Ewan W. Blanch, David I. Ellis, Royston Goodacre
Raman spectroscopy has attracted considerable interest during the past two decades as a vibrational technique used for the molecular characterisation of different molecules. Whilst the Raman effect is known to...
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Biosensor Applications of Graphene-Nanocomposites Bound Oxidoreductive and Hydrolytic Enzymes

RSC - Anal. Methods latest articles - Tue, 11/14/2017 - 04:13
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02606D, Critical ReviewQayyum Husain
Graphene based nanocomposites have successfully been employed for high yield and stable immobilization of oxidoreductive and hydrolytic enzymes. Enzymes immobilized both via adsorption and covalent attachment on graphene nanocomposites were...
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Bread-derived carbon foam as an adsorbent for the solid-phase microextraction of polybrominated diphenyl ethers

RSC - Anal. Methods latest articles - Mon, 11/13/2017 - 04:34
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02332D, PaperHao Yu, Yanfang Zhao, Lingxiao Yang, Xiangfeng Chen
In this work, bread-derived carbon foam (CF) was synthesized and used as a sorbent for the solid-phase microextraction (SPME) of pollutants from environmental water samples. CF fabricated with flour and...
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Development of a novel parallel determination platform: a feasibility study tested on a chemiluminescence device

RSC - Anal. Methods latest articles - Mon, 11/13/2017 - 04:34
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02394D, PaperChunjiao Yang, Zhongfeng Sun, Guojun Zhang, Lijuan Wang, Jie Zhang, Xin Zhang
The potential of obtaining incremental diagnostic information using a parallel assay is attractive. In this paper, a novel parallel determination platform was developed for the simultaneous determination of hormones including...
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A chemiluminescence method for the determination of verapamil hydrochloride in pharmaceutical and environmental samples based on Fe3O4 nanoparticles enhanced NaHCO3- H2O2 system

RSC - Anal. Methods latest articles - Mon, 11/13/2017 - 03:31
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02164J, PaperMortaza Iranifam, Nasim Rahmati Hendekhale
In this work, Fe3O4 nanoparticles (NPs) - enhanced chemiluminescence (CL) method was developed for determination of verapamil hydrochloride (VRP). To this aim, a quick precipitation method was employed to synthesis...
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The pH controlled fluorescence changes of a novel semiconducting polymer dots/pyrogallic acid system and a multifunctional sensing strategy for urea, urease and pesticides

RSC - Anal. Methods latest articles - Mon, 11/13/2017 - 03:31
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02284K, PaperHui Huang, Jiao Li, Mengxian Liu, Zizhun Wang, Bingdi Wang, Meini Li, Yongxin Li
In this paper, a novel multifunctional semiconducting polymer dots (Pdots)/pyrogallic acid (PA) system was established successfully for the fluorescence sensing of urea, urease and pesticides. The Pdots/PA system was pH...
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CaCO3 nanoparticles as the tags for potentiometric detection of cardiac biomarker using calcium ion-selective electrode

RSC - Anal. Methods latest articles - Mon, 11/13/2017 - 03:31
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01949A, CommunicationXiaohong Fu, Kun Xu, Xueyu Feng, Bo Chang, Fan Yang, Rong Huang
A nove potentiometric immunosensing protocol was developed for detection of myoglobin (a cardiac biomarker for acute myocardial infarction), using bovine serum albumin (BSA)-funtionalized calcium carbonate (CaCO3) nanoparticles the signal-generation tags...
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Determination of polycyclic aromatic hydrocarbons in surface water using simplified liquid-liquid micro-extraction and pseudo-MRM GC/MS/MS

RSC - Anal. Methods latest articles - Thu, 11/09/2017 - 06:51

Anal. Methods, 2017, Advance Article
DOI: 10.1039/C7AY01902E, PaperJeffrey Yan, Marcus Kim, Maxine Haberl, Honoria Kwok, Pamela Brunswick, Ceara MacInnis, Graham van Aggelen, Dayue Shang
A simplified liquid-liquid micro-extraction (LLME) GC/MS/MS method was developed for the determination of 18 polycyclic aromatic hydrocarbons (PAHs) in surface water.
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A one-step rapid screening test of Listeria monocytogenes in food samples using a real-time loop-mediated isothermal amplification turbidity assay

RSC - Anal. Methods latest articles - Thu, 11/09/2017 - 05:35

Anal. Methods, 2017, Advance Article
DOI: 10.1039/C7AY01750B, PaperSirirat Wachiralurpan, Thayat Sriyapai, Supatra Areekit, Pichapak Sriyapai, Dueantem Thongphueak, Somchai Santiwatanakul, Kosum Chansiri
A rapid and specific, hly-based, loop-mediated isothermal amplification (LAMP) was applied for the detection of Listeria monocytogenes in food samples using LAMP-turbidity.
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CVD graphene incorporating polymerized L-cysteine as an electrochemical sensing platform for simultaneous determination of dopamine and ascorbic acid

RSC - Anal. Methods latest articles - Thu, 11/09/2017 - 03:20
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02489D, PaperDanyu He, Shehong Li, Pu Zhang, Hongxia Luo
A graphene platform electrode (GPE) was prepared directly by transferring chemical vapor deposition (CVD) graphene films from Cu foils to polyethylene terephthalate substrates with the aid of polymethyl-methacrylate, a distinct...
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Sensitive and reliable paper-based glucose sensing mechanisms with smartphone readout using the L*a*b* color space

RSC - Anal. Methods latest articles - Wed, 11/08/2017 - 03:56
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02124K, PaperDeniz BAS
Paper-based assay platforms play an important role among the rapid test methods. It is essential to combine these promising platforms with smartphones which make on-site analysis possible without using external...
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Dual signal amplification strategy for electrochemical detection of platelet-derived growth factor BB

RSC - Anal. Methods latest articles - Tue, 11/07/2017 - 06:26
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02513K, PaperBin Xie, Ning Zhou, Rong Ding, Yuanchao Zhao, Bohan Zhang, Ting Li, Minghui Yang
The authors report a dual signal amplification strategy for improving the sensitivity of electrochemical immunosensor. Single-walled carbon nanotube (SCNT) was served as support for aptamer as well as alkaline phosphatase...
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Different-Molecular-Weight Chitosan Derivatives Employed for Enantiomeric Separation

RSC - Anal. Methods latest articles - Tue, 11/07/2017 - 03:08
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02174G, PaperGuosong Qiu, Kui Yan, Shan Zhang, Zhengwu Bai, Wei Chen, Shaohua Huang
In the present study, four chitosan (cylcopentylurea)s were synthesized from the chitosans with different viscosity-average molecular weights ranging from 1.2[times]105 to 2.1[times]105. The chitosan (cyclopentylurea)s were further derivatized with 3,5-dimethylphenyl...
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Self-Assembled Activated Carbon Nanoparticles for Reliable Time-Discretized Quantitative Surface-Enhanced Raman Spectroscopy

RSC - Anal. Methods latest articles - Mon, 11/06/2017 - 08:12
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02254A, PaperYuping Liu, Zhi-Wei Lu, WuLiJi Hasi, Hang Zhao, Bao lin, Fang Yang
Quantitative analysis is an important aspect of surface-enhanced Raman spectroscopy (SERS). However, due to change of enhancing performance of SERS substrates, it is difficult to obtain reliable analysis results. In...
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Development of biomimetic enzyme-linked immunosorbent assay based on molecular imprinting technique for the detection of enrofloxacin in animal food

RSC - Anal. Methods latest articles - Mon, 11/06/2017 - 07:12
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02321A, PaperJing Wang, Yaxin Sang, Weihua Liu, na Liang, Xianghong Wang
In this study, a direct competitive biomimetic enzyme-linked immunosorbent assay (BELISA) method using molecularly imprinted polymers (MIPs) as a bionic antibody was developed to detect enrofloxacin (ENRO) in animal food....
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Adsorption Behavior and Mechanism of Perfluorochemicals on Oxidized Fluorinated Graphene Sheets Supported on Silica

RSC - Anal. Methods latest articles - Mon, 11/06/2017 - 06:12
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02070H, PaperFan Li, Weili Wei, Die Gao, Zhining Xia
This is the first report on the fabrication of oxidized fluorinated graphene sheets supported on silica (OFG@silica) for selective adsorption of perfluorochemicals (PFCs). To increase the affinity towards PFCs, oxidized...
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Fast and simple method for identification of adulteration of cow's milk with urea using diffuse reflectance spectroscopy

RSC - Anal. Methods latest articles - Mon, 11/06/2017 - 05:10

Anal. Methods, 2017, Advance Article
DOI: 10.1039/C7AY02354E, PaperPaulo R. A. B. de Toledo, Aline T. Toci, Helena R. Pezza, Leonardo Pezza
This work describes the development and application of a simple, fast, cheap, and clean method for the detection of adulteration of raw cow's milk by urea, using a combined spot test/diffuse reflectance spectroscopy procedure.
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Highly dispersed palladium nanoparticles generated in situ on layered double hydroxide nanowalls for ultrasensitive electrochemical detection of hydrazine

RSC - Anal. Methods latest articles - Mon, 11/06/2017 - 04:08
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02324C, PaperLiang Xu, Zongkai Qu, Jun Chen, Xu Chen, Feng Li, Wensheng Yang
Rational design and fabrication of electrocatalytic nanomaterials is an effective approach for improving the sensitivity and stability of electrochemical sensors. Here, we report a novel CoAl-layered double hydroxide nanowall-supported Pd...
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