Analytical Chemistry News

Calibration transfer of flour NIR spectra between benchtop and portable instruments

RSC - Anal. Methods latest articles - Wed, 04/26/2017 - 08:04
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00391A, PaperAnna Luiza Bizerra Brito, Ada Vivianny Pereira Santos, Karla Tavares Melo Milanez, M. J. C . Pontes , Liliana Pontes
This work reports on the use of different strategies of calibration transfer to determine crude protein and fiber properties in samples of functional flours analyzed with benchtop (primary) and portable...
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Tellurium Speciation in Bioleaching Solution by Hydride Generation Atomic Fluorescence Spectrometry

RSC - Anal. Methods latest articles - Wed, 04/26/2017 - 08:04
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00866J, PaperMao Chen, Lichuan Wu, Xin Yi, Kaizhi Yang, Hongguan Xie
The speciation analysis of tellurium in bioleaching solution is of great value for the study of bacteria leaching mechanism of tellurium ores and further separation and extraction of tellurium from...
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Characterising and reducing the blank response from mercury vapour sorbent tubes

RSC - Anal. Methods latest articles - Wed, 04/26/2017 - 08:04
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00451F, PaperRichard J C Brown, Emma Braysher, Elizabeth McGhee, Sharon L Goddard, Hugo Ent, Ki-Hyun Kim, Jasslie Nielsen
An investigation into the factors contributing to the blank response of sorbent tubes used for sampling and measuring mercury vapour is presented. These contributing factors are quantified and strategies to...
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Electrochemical impedance spectroscopy of blood for sensitive detection of blood hematocrit, sedimentation and dielectric properties

RSC - Anal. Methods latest articles - Wed, 04/26/2017 - 08:04
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00714K, PaperAlexander Zhbanov, Sung Yang
The electrochemical impedance spectroscopy (EIS) is a highly promising tool for the analysis of blood. The electrical properties of plasma and blood cells provide fundamental insights into the health status...
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Ultrasound assisted supramolecular solvent microextraction coupled with graphite furnace atomic absorption spectrometry for speciation analysis of inorganic arsenic

RSC - Anal. Methods latest articles - Wed, 04/26/2017 - 08:04
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00738H, Paperhomeira ebrahimzadeh, Rouhollah Kashanaki, Morteza Moradi
A novel ultrasonic-assisted supramolecular solvent microextraction (USASS-ME) method was proposed for the selective microextraction of As (III, V) prior to their determination by graphite furnace atomic absorption spectrometry. Supramolecular solvent...
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A pseudo-ELISA based on molecularly imprinted nanoparticles for detection of gentamicin in real samples

RSC - Anal. Methods latest articles - Wed, 04/26/2017 - 07:04
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00398F, PaperSiping Tang, Francesco Canfarotta, Katarzyna Smolinska-Kempisty, Elena Piletska, Antonio Guerreiro, Sergey A Piletsky
The enzyme-linked immunosorbent assay (ELISA) is one of the most widely employed tests in diagnostics, and it relies on the use of antibodies to quantify the molecule of interest. Molecularly...
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A glucometer-based strategy for sensitive DNA methyltransferase activity detection via polymerization nicking reaction and enzyme amplification

RSC - Anal. Methods latest articles - Wed, 04/26/2017 - 07:04
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00712D, CommunicationYing Chen, HongChao Yi
DNA methyltransferase (MTase) is closely related to the DNA methylation level in many biological processes and has been recognized as a predictive cancer biomarker which occurs before other signs of...
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Dynamic background noise removal from overlapping GC-MS peaks via an entropy minimization algorithm

RSC - Anal. Methods latest articles - Wed, 04/26/2017 - 06:04

Anal. Methods, 2017, Advance Article
DOI: 10.1039/C7AY00632B, PaperChun Kiang Chua, Yunbo Lv, Hua Jun Zhang, Xiao Yu Gu
An entropy minimization approach is applied as a dynamic background noise removal system. Clean and pure mass spectra were extracted from overlapping GC-MS peaks and led to the accurate identification of chemical compounds.
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Application of hollow porous molecularly imprinted polymer using K2Ti4O9 coupled with SPE-HPLC for the determination of celecoxib in human urine samples: Optimization by Central Composite Design (CCD)

RSC - Anal. Methods latest articles - Tue, 04/25/2017 - 09:57
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00547D, PaperSaeedeh Ansari
A novel method is described for trace determination of celecoxib, a nonsteroidal anti-inflammatory drug (NSAID), by hollow porous molecularly imprinted polymer and solid-phase extraction (HPMIP-SPE) coupled with high-performance liquid chromatography...
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Determination of active ingredients in Chinese medicine Danning Tablets using dispersion solid-phase extraction by molecular imprinting nanomaterials coupled with HPLC-DAD

RSC - Anal. Methods latest articles - Tue, 04/25/2017 - 05:56

Anal. Methods, 2017, Advance Article
DOI: 10.1039/C7AY00376E, PaperJieping Luo, Ning Chen, Zaiyue Yang, Jiyong Han, Wanying Zhu, Junli Hong, Xuemin Zhou
A reliable pretreatment method of magnetic molecularly imprinted polymers/dispersive solid-phase extraction was developed for selectivity and enrichment of targets.
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Highly efficient fluorescent and colorimetric sensing of organic amine vapors based on Organometal halide perovskite nanostructures

RSC - Anal. Methods latest articles - Mon, 04/24/2017 - 10:51
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00961E, PaperPengcheng Wu, Qingguo He, Defeng Zhu, Haibo Jiang, Zinuo Jiao, Yu Zhang, Wei Xu, Yanyan Fu, Huimin Cao, Jiangong Cheng
Volatile organic amine vapors existed in various areas of human life which can cause a series of harmful effect on environment and human life. Thus, the detection of organic amine...
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COLORIMETRIC DETECTION OF HYPOCHLORITE BASED ON THE MORPHOLOGICAL CHANGES OF SILVER NANOPRISMS TO SPHERICAL NANOPARTICLES

RSC - Anal. Methods latest articles - Mon, 04/24/2017 - 10:51
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00716G, PaperSASIKUMAR THANGARASU, Ilanchelian Malaichamy
In this work, we have developed a simple, rapid, sensitive and selective colorimetric method for the quantitative determination of hypochlorite (ClO-) ion by using triangular silver nanoprisms (AgNPRs) as a...
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Rapid simultaneous determination of 22 constituents in Menispermi Rhizoma by ultra-performance liquid chromatography tandem triple quadrupole mass spectrometry

RSC - Anal. Methods latest articles - Mon, 04/24/2017 - 10:51
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00559H, PaperJinxia Wei, Kunna Cui, Yueying Du, Jia Yu, Zhen Jiang, Xingjie Guo
A multi-component-assay quality control method, using ultra-performance liquid chromatography coupled with electrospray ionization tandem mass spectrometry, has been developed for the simultaneous quantification of 22 constituents in Menispermi Rhizoma. By...
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Boosting extreme learning machine for near-infrared spectral quantitative analysis of diesel fuel and edible blend oil samples

RSC - Anal. Methods latest articles - Mon, 04/24/2017 - 10:51
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00353F, PaperXihui Bian, Caixia Zhang, Xiao-Yao Tan, Michal Dymek, Yugao Guo, Ligang Lin, Bowen Cheng, Xiaoyu Hu
Extreme learning machine (ELM) has drawn increasing attention due to its characteristics of simple structure, high learning speed and excellent performance. However, a single ELM tends to low predictive accuracy...
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Quantification of Intractable Membrane Proteins in Genetically Engineered Crops by Liquid Chromatography Coupled with Tandem Mass Spectrometry

RSC - Anal. Methods latest articles - Mon, 04/24/2017 - 10:51
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00161D, PaperLindsey Schacherer, Michaela Owens, Tiger Hu
Liquid chromatography with tandem mass spectrometry (LC-MS/MS) methods to quantify a membrane protein in genetically engineered maize leaves and another in soybean seeds were developed and validated. An extraction buffer...
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Practical Corrections for p(H,D) Measurements in Mixed H2O/D2O Biological Buffers

RSC - Anal. Methods latest articles - Mon, 04/24/2017 - 08:47
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00669A, Technical NoteK A Rubinson
Mixtures of light and heavy water are used in NMR, small-angle neutron scattering (SANS), growth media for producing deuterated biological molecules, and analytical methods such as Hydrogen-Deuterium Exchange (HDX) mass...
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Microchip-based 3D-cell culture using polymer nanofibers generated by solution blow spinning

RSC - Anal. Methods latest articles - Fri, 04/21/2017 - 12:18

Anal. Methods, 2017, Advance Article
DOI: 10.1039/C7AY00756F, PaperChengpeng Chen, Alexandra D. Townsend, Scott A. Sell, R. Scott Martin
Fibers produced by solution blow spinning (with a 3D printed sheath device) were integrated into a microfluidic device for 3D cell culture.
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Detection of small, highly structured RNAs by molecular beacons

RSC - Anal. Methods latest articles - Fri, 04/21/2017 - 09:16
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00341B, PaperJin Li, Chengzhen Xu, Naotaka Shimada, Yuichi Miyoshi, Kazunori Watanabe, Wang Cong, Takashi Ohtsuki
The use of molecular beacons is a versatile method to detect RNAs. Typically, a single-stranded region of RNA is selected as a target sequence for molecular beacons. Therefore, detection of...
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Nitrilotriacetate Stabilized Gold Nanoparticles: A Novel Strategy for Colorimetric Detection of Cr(III)/Cr(VI) and Mechanistic Aspect

RSC - Anal. Methods latest articles - Fri, 04/21/2017 - 09:16
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00989E, PaperJianyu Wei, luming Yang, guozong yue, jing zhu, deshun huang, Pengxiang Zhao
Nitrilotriacetate (NTA) is reported to behave as both reductant and stabilizer for gold nanoparticle (AuNP) preparation in one-pot synthesis and colorimetric assay. The goal is to avoid the negative influence...
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New Particle-based Trace Explosive Test Material Produced by Drop-On-Demand Inkjet Printing for Quantitative Wipe-Sampling Studies

RSC - Anal. Methods latest articles - Fri, 04/21/2017 - 07:15
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00554G, PaperJennifer R. Verkouteren, Jeffrey Lawrence, Timothy Brewer, Edward Sisco
A new approach is described to prepare particle standards of the explosive 1,3,5-trinitroperhydro-1,3,5-triazine (RDX) for use in quantitative wipe-sampling studies. Screening activities to detect traces of explosives are heavily focused...
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