Analytical Methods Blog

Take a look at our new hot articles just published in Analytical Methods. These papers are all free to read for the next few weeks. We hope you enjoy reading them!

Chemical analysis of the Tibetan herbal medicine Carduus acanthoides by UPLC/DAD/qTOF-MS and simultaneous determination of nine major compounds
Ru Li, Sui-ku Liu, Wei Song, Yuan Wang, Yan-jiao Li, Xue Qiao, Hong Liang and Min Ye  
Anal. Methods, 2014, Advance Article
DOI: 10.1039/C4AY01138D, Paper

In situ characterization by Raman and X-ray fluorescence spectroscopy of post-Paleolithic blackish pictographs exposed to the open air in Los Chaparros shelter (Albalate del Arzobispo, Teruel, Spain)
Àfrica Pitarch, Juan Francisco Ruiz, Silvia Fdez-Ortiz de Vallejuelo, Antonio Hernanz, Maite Maguregui and Juan Manuel Madariaga  
Anal. Methods, 2014,6, 6641-6650
DOI: 10.1039/C4AY00539B, Paper

Detection of residual biocides in antibody drug conjugates for ImmunoPET imaging
Colin D. Medley, Jason Gruenhagen, Peter Yehl and Nik P. Chetwyn  
Anal. Methods, 2014,6, 6635-6640
DOI: 10.1039/C4AY01418A, Paper

Electrophysiological analysis of biopsy samples using elasticity as an inherent cell marker for cancer detection
Azhar Ilyas, Waseem Asghar, Shahina Ahmed, Yair Lotan, Jer-Tsong Hsieh, Young-tae Kim and Samir M. Iqbal  
Anal. Methods, 2014, Advance Article
DOI: 10.1039/C4AY00781F, Paper

Microchip nonaqueous capillary electrophoresis of saturated fatty acids using a new fluorescent dye
M. L. Cable, A. M. Stockton, M. F. Mora, K. P. Hand and P. A. Willis  
Anal. Methods, 2014, Advance Article
DOI: 10.1039/C4AY01243G, Communication

Mobile Water Kit (MWK): a smartphone compatible low-cost water monitoring system for rapid detection of total coliform and E. coli
Naga Siva Kumar Gunda, Selvaraj Naicker, Sujit Shinde, Sanjay Kimbahune, Sandhya Shrivastava and Sushanta Mitra  
Anal. Methods, 2014,6, 6236-6246
DOI: 10.1039/C4AY01245C, Paper

Cotton fabric as an immobilization matrix for low-cost and quick colorimetric enzyme-linked immunosorbent assay (ELISA)
Saeedeh Bagherbaigi, Emma P. Córcoles and Dedy H. B. Wicaksono  
Anal. Methods, 2014, Advance Article
DOI: 10.1039/C4AY01071J, Paper

A new screening method for recombinant Saccharomyces cerevisiae strains based on their xylose fermentation ability measured by near infrared spectroscopy
Hiroyuki Morita, Tomohisa Hasunuma, Maria Vassileva, Akihiko Kondo and Roumiana Tsenkova  
Anal. Methods, 2014,6, 6628-6634
DOI: 10.1039/C4AY00785A, Paper

A new screening method for recombinant Saccharomyces cerevisiae strains based on their xylose fermentation ability measured by near infrared spectroscopy
Hiroyuki Morita, Tomohisa Hasunuma, Maria Vassileva, Akihiko Kondo and Roumiana Tsenkova  
Anal. Methods, 2014,6, 6628-6634
DOI: 10.1039/C4AY00785A, Paper

To ensure high crop yield, the addition of pesticides to crops may seem like a necessary evil. However, most applied chemicals have adverse side-effects to our health. Consequently, simple, effective, and accurate methods of pesticide detection is critical for safe food consumption. Unfortunately, most direct methods of pesticide detection that do not require sample preparation can only provide qualitative results. Furthermore, methods that are capable of quantitative analysis require complicated, time-consuming procedures of sample preparation prior to analysis. Anastasia Albert from the University of Muenster, Carsten Engelhard from the University of Siegen and other colleagues from Germany have evaluated ambient desorption/ionization high-resolution mass spectrometry (ADI-HR-MS) for quantitative pesticide detection in fruit, and have devised a streamlined procedure for effective analysis. Find out more about their discovery by accessing the link below:

ADI-HR Mass Spectrometry for Pesticide Detection in Fruit

Rapid and quantitative analysis of pesticides in fruits by QuEChERS pretreatment and low-temperature plasma desorption/ionization orbitrap mass spectrometry

Anastasia Albert, Andrea Kramer, Simon Scheeren and Carsten Engelhard

DOI: 10.1039/C4AY00103F

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Take a look at our new hot articles just published in Analytical Methods. These papers are all free to read for the next few weeks. Enjoy the reading!

Determination of boron in silicon without use of additional complexing agents
Matthias Balski, Franziska Emmerling, Heinrich Kipphardt and Ulrich Panne 
Anal. Methods, 2014, Advance Article
DOI: 10.1039/C4AY00410H, Paper

Rapid and quantitative analysis of pesticides in fruits by QuEChERS pretreatment and low-temperature plasma desorption/ionization orbitrap mass spectrometry
Anastasia Albert, Andrea Kramer, Simon Scheeren and Carsten Engelhard 
Anal. Methods, 2014, Advance Article
DOI: 10.1039/C4AY00103F, Paper

Time-gated fluorescence sensor for silver ions using Mn:CdS/ZnS quantum dots/DNA/gold nanoparticle complexes
Xiaoyan Leng, Dawei Huang, Chenggang Niu, Xiaoyu Wang, Guangming Zeng and Qiuya Niu 
Anal. Methods, 2014, Advance Article
DOI: 10.1039/C3AY42129E, Paper

Rapid measurement of total polyphenols content in cocoa beans by data fusion of NIR spectroscopy and electronic tongue
Xingyi Huang, Ernest Teye, Livingstone K. Sam-Amoah, Fangkai Han, Liya Yao and William Tchabo 
Anal. Methods, 2014, Advance Article
DOI: 10.1039/C4AY00223G, Paper

Protein/peptide purification by three-well OFFGEL electrophoresis with immobilized ultra narrow pH gradient gels
Elena Tobolkina, Fernando Cortés-Salazar, Liang Qiao and Hubert H. Girault 
Anal. Methods, 2014, Advance Article
DOI: 10.1039/C4AY00088A, Paper

A formaldehyde trace gas sensor based on a thermoelectrically cooled CW-DFB quantum cascade laser
Jingsong Li, Uwe Parchatka and Horst Fischer 
Anal. Methods, 2014, Advance Article
DOI: 10.1039/C3AY41964A, Paper

New insights on blue pigments used in 15th century paintings by synchrotron radiation-based micro-FTIR and XRD
Nati Salvadó, Salvador Butí, Miguel A. G. Aranda and Trinitat Pradell 
Anal. Methods, 2014,6, 3610-3621
DOI: 10.1039/C4AY00424H, Paper

Real-time detection of chemical warfare agent simulants in forensic samples using active capillary plasma ionization with benchtop and field-deployable mass spectrometers
Morphy Dumlao, Pablo Martinez-Lozano Sinues, Maryia Nudnova and Renato Zenobi 
Anal. Methods, 2014,6, 3604-3609
DOI: 10.1039/C4AY00303A, Paper

Determination of iodinated X-ray contrast agents in pharmaceutical formulations and artificial urine samples by differential pulse voltammetry
Piotr Markowski, Katarzyna Piwowar and Irena Baranowska 
Anal. Methods, 2014, Advance Article
DOI: 10.1039/C4AY00538D, Paper

Amplified fluorescence sensing of miRNA by combination of graphene oxide with duplex-specific nuclease
Shuang Guo, Fan Yang, Yulin Zhang, Yong Ning, Qunfeng Yao and Guo-Jun Zhang 
Anal. Methods, 2014,6, 3598-3603
DOI: 10.1039/C4AY00345D, Paper

Which spectroscopic technique allows the best differentiation of coffee varieties: comparing principal component analysis using data derived from CD-, NMR- and IR-spectroscopies and LC-MS in the analysis of the chlorogenic acid fraction in green coffee beans
Sagar Deshpande, Rasha M. El-Abassy, Rakesh Jaiswal, Pinkie Eravuchira, Bernd von der Kammer, Arnulf Materny and Nikolai Kuhnert 
Anal. Methods, 2014,6, 3268-3276
DOI: 10.1039/C3AY41970C, Paper

Test for methylarginines in newborn infants

Developing an analytical technique for use in the field of neo-natal intensive care presents a significant challenge to researchers. Newborn infants who are very premature and unwell can’t safely provide large blood samples for analysis, and a fast turn-around of lab results is crucial for a life-saving diagnosis.

Methylarginines (MAs) are nitric oxide synthase inhibitors which have been linked to respiratory problems in newborns. Researchers led by Susan Lunte at the University of Kansas, USA, report the use of capillary electrophoresis (CE) to measure and track methylarginine concentrations in infant blood plasma for the first time. Their newly developed sample preparation and separation methods are specifically designed to cope with low volume plasma samples, and the results confirm that infants in neo-natal intensive care units (NICUs) have extremely high MA levels.

Click the link below to read more… This article will be free to access until June 7^th.

Determination of methylarginines in infant plasma by CE-LIF
Thomas H. Linz and Susan M. Lunte
Anal. Methods, 2014, Advance Article
DOI: 10.1039/C4AY00340C

Statistical methods such as partial least squares (PLS) and principle component analysis (PCA) have been used to process vibrational spectra in order to understand certain trends between samples and their spectra. However, these methods and similar ones break down when the variables demonstrate a nonlinear relationship.