Analytical Chemistry News

Engineering Oligonucleotide-Based Peroxidase Mimetics for Colorimetric Assay of S1 Nuclease

RSC - Anal. Methods latest articles - Mon, 02/12/2018 - 23:01
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02830J, PaperChuan He, Jinli Zhang, Wei Li, Yan Fu
Herein we propose a rational design to construct peroxidase mimetics in response to S1 nuclease by employing guanine-rich oligonucleotides and Cu2+ ions. The enzymatic activities of DNA-Cu(II) are highly dependent...
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Detection of phytocannabinoids from buccal swabs by headspace solid phase microextraction - gas chromatography/mass spectrometry

RSC - Anal. Methods latest articles - Mon, 02/12/2018 - 23:01
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02996A, CommunicationTiffany McCann, Lauren Perry, Wei-Chuan Shih, Jorn Chi-Chung Yu
Headspace solid phase microextraction (HS-SPME), which is a solvent-free extraction technique, was configured with gas chromatography/mass spectrometry (GC/MS) to detect phytocannabinoids from buccal swabs. The HS-SPME extraction procedure, i.e. extraction...
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Adsorptive stripping voltammetric determination of dicyclomine hydrochloride at glassy carbon electrode modified with silver decorated Fe3O4 nanocubes in pharmaceutical and biological samples

RSC - Anal. Methods latest articles - Mon, 02/12/2018 - 19:55
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C8AY00009C, PaperChaitali R Rawool, Anuja S Rajpurohit, Ninad S Punde, Ashwini Kumar Srivastava
The proposed work introduces an electrochemical sensor based on Fe3O4/Ag nanocomposite for highly sensitive and selective electrochemical determination of Dicyclomine hydrochloride (DcCl) using adsorptive stripping square wave voltammetry (AdSSWV). A...
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Paper based lateral flow immunoassay for the enumeration of Escherichia coli in urine

RSC - Anal. Methods latest articles - Mon, 02/12/2018 - 19:55
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02974H, PaperAysen Gumustas, Mehmet Gokhan Caglayan, Merve Eryilmaz, Zekiye Suludere, Esra Acar Soykut, Bengi Uslu, Ismail H Boyac[i without dot], Ugur Tamer
In this experimental study, we developed lateral flow immunoassay strips for detection of Escherichia coli. For labelling, gold nanoparticles were prepared and modified with a Raman label. Meanwhile, not only...
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Effects of electrode insertion depth on neural signal amplitude in the spinal cord

RSC - Anal. Methods latest articles - Mon, 02/12/2018 - 10:45
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C8AY00028J, PaperShijie Deng, Hai Hu, Peng Wang
The technique used for electrode insertion navigation is of crucial importance for neural signal collection. The spinal cord mapping method tracks the placement of electrodes throughout their insertion trajectory in...
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Sulfonated chitooligosaccharide modified silica material for hydrophilic interaction liquid chromatography and its chromatographic evaluation

RSC - Anal. Methods latest articles - Mon, 02/12/2018 - 10:45
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C8AY00070K, PaperKui Yan, Haiyan Yang, Shaohua Huang, Zhengwu Bai
A novel stationary phase derived from sulfonated chitooligosaccharide (COS) was prepared and evaluated in hydrophilic interaction liquid chromatography (HILIC) mode. Fourier-transform infrared spectroscopy (FT-IR), elemental analysis (EA), and thermogravimetry analysis...
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Fast simultaneous detection of three diterpenoids in Herba Siegesbeckiae using solid phase extraction followed by HPLC-UV with core-shell particle column

RSC - Anal. Methods latest articles - Mon, 02/12/2018 - 10:45
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C8AY00046H, PaperYong Zhang, Zhizhong Zou, Guixin Chou
To determine the kirenol, darutoside and darutigenol in Herba Siegesbeckiae within HPLC quickly, the ability of sample cleanup with different solid phase extraction was systematically investigated. The results showed that...
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Guanidinium ionic liquid-based surfactant as adequate solvent to separate and preconcentrate cadmium and copper in waters using in-situ dispersive liquid-liquid microextraction

RSC - Anal. Methods latest articles - Sun, 02/11/2018 - 22:37
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C8AY00022K, PaperMeriem Khiat, Idaira Pacheco-Fernandez, Veronica Pino, Tayeb Benabdallah, Juan H. Ayala, Ana M. Afonso
An in-situ dispersive liquid-liquid microextraction (DLLME) method together with flame atomic absorption spectroscopy (FAAS) is developed for the extraction and determination of copper and cadmium from aqueous samples using as...
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Authenticity assessment of anabolic androgenic steroids in counterfeit drugs by 1H NMR

RSC - Anal. Methods latest articles - Sun, 02/11/2018 - 22:37
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C8AY00158H, PaperMarcos Vinicuis de Moura Ribeiro, Nivaldo Boralle, Helena Redigolo Pezza, LEONARDO PEZZA
Anabolic steroids are synthetic hormone derivatives of testosterone, a masculine sex hormone. Their main effects include greater muscle size, physical strength, and resistance. The need for safe and reliable quality...
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New and simple electroanalytical method useful for detecting thiomersal in vaccines on a screen-printed electrode modified with chitosan

RSC - Anal. Methods latest articles - Sun, 02/11/2018 - 22:37
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C8AY00161H, PaperEdgar Nagles, Camila Gonzales, Olimpo Garcia-Beltran
The use of a screen-printed electrode modified with chitosan (Cs) to determine thiomersal (TMS) through the oxidation of the thiosalicylic acid by linear sweep anodic stripping voltammetry is reported for...
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Simultaneous determination of rifampicin, isoniazid, pyrazinamide and ethambutol in fixed dose combination antituberculosis pharmaceutical formulations: a review

RSC - Anal. Methods latest articles - Sun, 02/11/2018 - 22:37
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02686B, Critical ReviewMarcone Augusto Leal de Oliveira, Paula Chellini, Tatiane Lima Amorim
According to the World Health Organization, rifampicin, isoniazid, pyrazinamide and ethambutol hydrochloride are the first line drugs used to treat tuberculosis, an infectious disease caused by Mycobacterium tuberculosis. Since 2010,...
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A Novel IMAC Platform-Adenosine Coupled Functional Magnetic Microspheres for Phosphoproteome Research

RSC - Anal. Methods latest articles - Sun, 02/11/2018 - 22:37
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02931D, PaperYinghua Yan, Yujie Lu, Mengying Chen, Hongze Liang Liang
Immobilized metal affinity chromatography is a powerful method in phosphopeptide enrichment. However, the achievement of highly specific enrichment and sensitive detection of phosphopeptide by this method remains a big challenge...
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Designed multifunctional ionic liquids-magnetic graphene nanocomposites as the adsorbentn of MSPE for the determination of preservatives

RSC - Anal. Methods latest articles - Sun, 02/11/2018 - 22:37
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02746J, PaperShurui Cao, Yaling Chen, Lei Zhang, Cunxian Xi, xianliang li, Bobin Tang, guomin wang, Zhiqiong Chen
A new structural design of four kinds of ionic liquids were successfully fabricated, which was based on changing the anion of 1-vinyl-3-octylimidazolium bromide (VOIm+Br-) with benzene sulfonic acid (BenSO3-), 2-naphthalene...
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The doping level of boron-doped diamond electrodes affects the voltammetric sensing of[space]uric acid

RSC - Anal. Methods latest articles - Fri, 02/09/2018 - 10:20

Anal. Methods, 2018, Advance Article
DOI: 10.1039/C7AY02720F, PaperK. Cinkova, K. Kianickova, D. M. Stankovic, M. Vojs, M. Marton, L. Svorc
In this work, the electrochemical oxidation and subsequent determination of uric acid was investigated using boron-doped diamond electrodes with various B/C ratios (0-2000 ppm).
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Quantitative analysis of sinters using laser-induced breakdown spectroscopy (LIBS) coupled with kernel-based extreme learning machine(K-ELM)

RSC - Anal. Methods latest articles - Thu, 02/08/2018 - 20:05
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02748F, PaperYu Ding, Fei Yan, Guang Yang, Haixiu Chen, Zhensheng Song
This work explores the combination of LIBS technology and K-ELM algorithm for the quantitative analysis of total iron(TFe) content and alkalinity of sinter. The main components of sinter ore samples...
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Simultaneous determination of fifteen toxic alkaloids in meat dishes and vegetable dishes using double layer pipette tip magnetic dispersive solid phase extraction followed by UFLC-MS/MS

RSC - Anal. Methods latest articles - Thu, 02/08/2018 - 20:05
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02608K, PaperHeli Cheng, Fenglian Wang, Yong-Gang Zhao, Yun Zhang, Mi-Cong Jin, Yan Zhu
A novel double layer pipette tip magnetic dispersive solid phase extraction (DPT-MSPE) based on polyamidoamine-functionalized magnetic carbon nanotubes (PAMAM@Mag-CNTs) was developed for the purification of fifteen toxic alkaloids in meat...
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Endonuclease Restriction-Mediated Real-Time PCR for Simultaneous Detection of Listeria monocytogenes and Listeria ivanovii

RSC - Anal. Methods latest articles - Tue, 02/06/2018 - 20:02
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02667F, PaperYan Wang, Yi Wang, Changyun Ye
Listeria monocytogenes and Listeria ivanovii have been identified as the only two pathogenic species in Listeria genus. Food contamination with L. monocytogenes was a severe public health issues accompanied with...
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Fast and sensitive low density solvent based dispersive liquid-liquid microextraction method combined with high-performance liquid chromatography for determining cholecalciferol (vitamin D3) in milk and yogurt drink samples

RSC - Anal. Methods latest articles - Tue, 02/06/2018 - 20:02
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02915B, PaperMarzieh Kamankesh, Mehrnoosh Shahdoostkhany, Abdorreza Mohammadi, Afsaneh Mollahosseini
In this research, low density solvent based dispersive liquid-liquid microextraction (LDS-DLLME) as a simple, fast and efficient microextracton method followed by high-performance liquid chromatography was employed to determine cholecalciferol (vitamin...
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Quantification of Carbon Nanotubes in Polymer Composites

RSC - Anal. Methods latest articles - Tue, 02/06/2018 - 06:44
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C7AY02654D, PaperTakayuki Nosaka, Ronald Lankone, Yuqiang Bi, Howard Fairbrother, Paul Westerhoff, Pierre Herckes
Quantifying carbonaceous nanomaterials (CNMs) has largely been limited to soil, water or biological matrices, but the largest application of CNMs is carbon nanotubes (CNTs) embedded in polymers or plastics. This...
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Rapid Discrimination of Natural Polyphenols (Vegetable Tannins) from Different Plants by Molecular Spectroscopy and PLS-DA

RSC - Anal. Methods latest articles - Mon, 02/05/2018 - 20:33
Anal. Methods, 2018, Accepted Manuscript
DOI: 10.1039/C8AY00075A, PaperFabio dos Santos Grasel, Marco Flores Ferrao
In this work, samples of natural polyphenolic extracts, representing six commercially available types, were analysed by visible, ultraviolet and Fourier transform infrared (FTIR) spectroscopy with classification technique. Classification model was...
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