Analytical Chemistry News

Separation and detection of free D- and L-amino acids in tea by off-line two-dimensional liquid chromatography

RSC - Anal. Methods latest articles - Mon, 10/02/2017 - 22:13
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01569K, PaperXiangyu Wang, Huihui Wu, Rongying Luo, Donghai Xia, Zhengjin Jiang, Hai Han
D-amino acids are currently paid attention as new physiologically active substances. Foodstuffs and beverages containing D-amino acids are the matter of interest. Until now, the profile of D-amino acids has...
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Determination of benzoic acid and sorbic acid in seasoning by capillary electrophoresis with new triethylamine aminated polychloromethyl styrene nanolatex coated capillary column

RSC - Anal. Methods latest articles - Mon, 10/02/2017 - 22:13
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01930K, PaperWei Tang, Xiangyu Tian, Yanhao Zhang, Dan Yin, Wuduo Zhao, Wenfen Zhang, Shusheng Zhang
In this work, a method for the determination of benzoic acid (BA) and sorbic acid (SA) in soy sauce and vinegar was developed by field-amplified sample stacking open-tubular capillary electrochromatography...
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NIR hyperspectral imaging with multivariate analysis for measurement of oil and protein content in peanut varieties

RSC - Anal. Methods latest articles - Mon, 10/02/2017 - 06:00
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02115A, PaperHuli Jin, Junhu Cheng, Zhongyue Xu, Fuping Zheng
The potential of hyperspectral imaging in the spectral range of 1000-2500 nm with multivariate analysis for prediction of oil and protein concentration in five peanut cultivars was investigated. Quantitative partial...
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CNTs-anchored Cellulose Fluorescent Nanofiber Membranes as Fluorescence Sensor for Cu2+ and Cr3+

RSC - Anal. Methods latest articles - Fri, 09/29/2017 - 05:01
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01994G, PaperYao Gu, Meiling Wang, Guizhen LI
1,4-Dihydroxyanthraquinone (1,4-DHAQ, a fluorophore) doped carbon nanotubes@cellulose (1,4-DHAQ-doped CNTs@CL) nanofibrous membranes have been prepared via electrospining and subsequent deacetylating in this work. It has been successfully applied for highly sensitive...
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An effective signal enhancement strategy for sensing cysteine based on aluminium-initiated emission

RSC - Anal. Methods latest articles - Fri, 09/29/2017 - 04:01
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02026K, PaperZou Wu , Xuejiao Chen, Huan Cheng , Tingting Gu, Xia Jiaoyun, Chen Can, Fu Chun Gong
An efficient signal enhancement strategy for the detection of cysteine(Cys) was developed, which is based on the combination of Cys-reduced reaction with the chelation of Al3+ with the Cys-promoted product....
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PH-sensing fluorescence oligonucleotide probes based on an i-motif scaffold: A review.

RSC - Anal. Methods latest articles - Thu, 09/28/2017 - 09:45
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01942D, Critical ReviewAnna Dembska, Patrycja Bielecka, B. Juskowiak
Fluorescence-based approaches have found widespread applications in cell biology. The pH-sensing using fluorescent i-motifs is a potentially useful strategy for real-time, in vivo monitoring of important cellular processes. I-motif scaffold...
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Advantages of aptamers as ligands upon protein detection by AFM-based fishing

RSC - Anal. Methods latest articles - Thu, 09/28/2017 - 07:45
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01216K, PaperTatyana Pleshakova, Anna Kaysheva, Jana Bayzyanova, Anna Anashkina, Vasiliy Uchaikin, Ivan Shumov, Vadim Ziborov, Vladimir Konev, Alexander Archakov, Yuri Ivanov
Combined AFM/MS method was employed for protein registration in solution. This method is based on reversible specific capturing of target protein from a large volume of analyzed solution onto a...
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A SPR aptamer sensor for mercury based on AuNPs@NaYF4:Yb,Tm,Gd upconversion luminescence nanoparticles

RSC - Anal. Methods latest articles - Thu, 09/28/2017 - 04:43
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01810J, PaperBo Ling, Yuanhui Ma, Hongqi Chen, Lun Wang
A new aptamer-based surface plasmon resonance (SPR) system has been designed to detect Hg2+ that utilizes near-infrared (NIR)-to-NIR gold nanoparticles coated NaYF4:Yb,Tm,Gd up-conversion nanoparticles (AuNPs@NaYF4:Yb,Tm,Gd UCNPs) as a probe. The...
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Preparation of a novel restricted access material combined to molecularly imprinted polymer for selective solid-phase extraction and gas chromatography determination of heptachlor, endosulfan and their metabolites residues in pork

RSC - Anal. Methods latest articles - Wed, 09/27/2017 - 04:23
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01941F, PaperHai Gen Zuo, Yang Hong, Jianxin Zhu, Yuan Ding
A novel method was established using a restricted access material combined to molecularly imprinted polymer (RAM-MIP) as sorbent material in solid phase extraction (SPE) for clean-up of[small alpha]-endosulfan, [small beta]-endosulfan, endosulfate, endosulfan-ether,...
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Sphingosine and dihydrosphingosine as biomarkers for multiple sclerosis identified by metabolomic profiling using coupled UPLC-MS

RSC - Anal. Methods latest articles - Mon, 09/25/2017 - 07:35
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01922J, PaperSean Ward, Michael I Page, Patrick McHugh, Nicholas Trevor Powles
The project aim was to identify differences in the metabolomic profiles in the serum of patients with multiple sclerosis (MS), those with neuropathic pain (NP) and those with both MS...
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Impedimetric response study for the efficient detection of breast cancer specific biomarker CA 15-3 using tin oxide thin film based immunoelectrode

RSC - Anal. Methods latest articles - Mon, 09/25/2017 - 03:30
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01609C, PaperKashima A, Monika Tomar, Vinay Gupta
A novel and sensitive RF magnetron sputtered tin oxide (SnO2) thin film based breast cancer immunosensor that fuses the exquisite sensitivity, rapid determination and specificity with the simple, inexpensive and...
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Green analytical flow method for determination of total sulfite in wine using membraneless gas-liquid separation with contactless conductivity detection

RSC - Anal. Methods latest articles - Fri, 09/22/2017 - 10:30
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01879G, PaperDuangjai Nacapricha, Nattapong Chantipmanee, Waleed Alahmad, Thitaporn Sonsa-ard, Kanchana Uraisin, Nuanlaor Ratanawimarnwong, Thitirat Mantim
A green analytical flow method was developed for the determination of total sulfite preservative in white wine. The method employs membraneless vaporization (MBL-VP) technique for gas-sample separation allowing direct analysis...
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MicroRNA Detection of Amplification-Free Based on Controllable Solid-State Electrochemiluminescence Quenched by Charge Transfer

RSC - Anal. Methods latest articles - Fri, 09/22/2017 - 10:30
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01724C, PaperLiping Lu, Chang Liu, Tianfang Kang, Lin Wang
Abstract Effective and sensitive microRNA detection is a great challenge. Most of microRNA assays applied amplification strategy to obtain high sensitivity, which made them complicated. Herein, we present a simple...
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Headspace-gas chromatography-mass spectrometry for the rapid determination of possible biomarkers in urine samples

RSC - Anal. Methods latest articles - Fri, 09/22/2017 - 08:28
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01655G, PaperRosa Maria Gonzalez Paredes, Carmelo Garcia Pinto, Jose Luis Perez Pavon, Bernardo Moreno-Cordero
The development of rapid analytical strategies plays a vital role for the research, discovery and confirmation of analytes that can be sensitive biomarkers. Within this line of work, a method...
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Visual determination of ferric ions in aqueous solution based on a high selectivity and sensitivity ratiometric fluorescent nanosensor

RSC - Anal. Methods latest articles - Thu, 09/21/2017 - 21:21
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01917C, PaperHaolan Wu, Lian Yang, Linfeng Chen, Fang Xiang, Hongyu Gao
A novel ratiometric fluorescent nanosensor for visual sensing of Fe3+ has been developed by integrating yellow-emissive rhodamine derivatives (RhB) onto the surface of silica nanospheres embedded with red CdTe QDs....
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A deep eutectic solvent-based extraction method for fast determination of Hg in marine fish samples by cold vapor atomic absorption spectrometry

RSC - Anal. Methods latest articles - Thu, 09/21/2017 - 06:03
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01372H, PaperFarzaneh Rastegari fard, Kamal Ghanemi, Mehdi Fallah-Mehrjardi
An efficient sample extraction method for determination of total Hg in fish samples was developed. The method is based on the complete dissolution of samples in a deep eutectic solvent...
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Surface enhanced raman spectroscopy for detection of hydrogen cyanide in breath from children colonised with P. aeruginosa

RSC - Anal. Methods latest articles - Thu, 09/21/2017 - 06:03
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01693J, PaperRikke Kragh Lauridsen, Peter Skou, Tomas Rindzevicius, Kaiyu Wu, Soren Molin, Soren Balling Engelsen, Kim Gjerum Nielsen, Helle K Johansen, Anja Boisen
There is a need for a fast and non-invasive tool to detect Pseudomonas aeruginosa airway colonisation in cystic fibrosis (CF) patients unable to expectorate. Fifty CF children and 19 controls...
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A novel HPLC method for determination of zonisamide in human plasma using microextraction by packed sorbent optimised by experimental design

RSC - Anal. Methods latest articles - Thu, 09/21/2017 - 05:01
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01912B, PaperDina Lourenco, Mafalda Sarraguca, Alves Gilberto, Paula Coutinho, Andre RTS Araujo, Marcio Jose de Abreu Marques Rodrigues
A novel high-performance liquid chromatography-diode array detection method based on microextraction by packed sorbent (MEPS) as sample preparation approach is described for the determination of zonisamide (ZNS) in human plasma....
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Detection of chemical constituents in Gegenqinlian decoction by ultra high performance liquid chromatography coupled with Fourier transform ion cyclotron resonance mass spectrometry

RSC - Anal. Methods latest articles - Thu, 09/21/2017 - 05:01
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY02082A, PaperTing Liu, yue cui, xiumin tian, songhe li, fei han, Bin Ji, Yunli Zhao, zhiguo Yu
Gegenqinlian decoction (GQLD) is one of the classic traditional Chinese medicine. The formula consists of four herbal medicines including Radix Puerariae lobatae, Radix Scutellariae, Coptidis Rhizoma, and Glycyrrhizae Radix et...
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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 - Thu, 09/21/2017 - 05:01
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY01692A, PaperAlexander Zhbanov, Sung Yang
Results reported in the companion paper (Zhbanov and Yang, Anal. Methods, 2017, 17, 3302) showed that the electrochemical impedance spectroscopy is a highly promising tool for the analysis of blood....
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