Analytical Chemistry News

Bright Red Fluorescent Conjugated Polymer Nanoparticles with Dibenzopyran as Electron Donor for Cell Imaging

RSC - Anal. Methods latest articles - Wed, 05/17/2017 - 06:21
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00585G, PaperMengyue Fan, Yuanyuan Zhou, Yijing Guo, Jinsheng Song, Xinrui Duan
Fluorescent conjugated polymers have been successfully used to make CPNs for cellular imaging, bio-orthogonal labeling, and in vivo tumor targeting, since CPNs have superior bright fluorescent emission and photo-stability. However,...
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A Beryllium-Selective Microcantilever Sensor Modified with Benzo-9-crown-3 Functionalized Polymer Brushes

RSC - Anal. Methods latest articles - Wed, 05/17/2017 - 06:21
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00490G, PaperRongpeng Peng, Ling-Bao Xing, Xiao-Jun Wang, Cheng-Juan Wu, Bin Chen, Frank (Haifeng) Ji, Li-Zhu Wu, Chen-Ho Tung
A benzo-9-crown-3 functionalized polymer brush was prepared via surface-initiated atom transfer radical polymerization on the gold surface of microcantilevers for selective detection of Be2+. Other metal ions, such as Li+,...
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Laboratory analytical methods applied in the early detection of cancers by tumor biomarker

RSC - Anal. Methods latest articles - Wed, 05/17/2017 - 06:21
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00926G, Minireviewweizhong wang, yan yu, xiuqing zhang, xiangmin tong
Cancer threatens the health of the human being nowadays, and it has a high mortality all over the world. Early detection of cancer is the key to the prevention and...
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Metabolic Comparison of Dorsal versus Ventral Cells Directly in the Live 8-cell Frog Embryo by Microprobe Single-cell CE-ESI-MS

RSC - Anal. Methods latest articles - Tue, 05/09/2017 - 06:55
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00834A, PaperRosemary M. Onjiko, David O. Plotnick, Sally A. Moody, Peter Nemes
Single-cell mass spectrometry (MS) empowers the characterization of metabolomic changes as cells differentiate to different tissues during early embryogenesis. Using whole-cell dissection and capillary electrophoresis electrospray ionization (CE-ESI) MS, we...
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Determination of free amino acids and nucleosides and nucleobases in Annona squamosa L. fruitages from different regions in China by LC-QTRAP-MS/MS

RSC - Anal. Methods latest articles - Mon, 05/08/2017 - 08:40
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00129K, PaperYa-yun Chen, Peng Hu, Yuan-jiao Zhang, Yue Li, Xiao-li Zhu, Jianwei Chen, Xiaobing Cui, Xiang Li, Yong Chen
The quantitative analysis of amino acids, nucleosides and nucleobases was important for the quality evaluation of the popular fruits Annona squamosa L. from different regions in China. In order to...
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Separation, detection and identification of phase I and phase II metabolites and their corresponding polycyclic aromatic compounds

RSC - Anal. Methods latest articles - Mon, 05/08/2017 - 07:40
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00715A, PaperLinus Malmquist, Esther Boll, Nikoline Juul Nielsen, Jan Christensen
Polycyclic aromatic compounds (PACs) are transformed into polar metabolites in environmental matrices. These metabolites are rarely included in risk assesments, although they contribute to the toxicity of PAC pollutions including...
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Determination of Hydrogen Peroxide by Novel Test Strips Based on Plastic Microcapillary Film

RSC - Anal. Methods latest articles - Mon, 05/08/2017 - 07:40
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00584A, Paperzheyun xu, Feng Jiang, Fanghao Zhou, Zhongbin Xu, Haoyan Xu, Xiaodong Ruan
This work proposes a novel method for semi-quantitative determination of hydrogen peroxide (H2O2) in routine applications. Potassium Iodide (KI) and starch are adopted as chromogenic reagents, while microcapillary films (MCFs)...
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Stable Isotope Labeling Assisted LC-MS Method for Determination of Polyamines in Micro Tissues of Rice

RSC - Anal. Methods latest articles - Mon, 05/08/2017 - 05:39
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00805H, PaperQiu-Yi Wang, Tian-tian Ye, Shu-Jian Zheng, Er-Cui Ye, Ren-Qi Wang, Yu-Qi Feng
Stable isotope labeling assisted LC-MS method were developed for highly sensitive quantitation of polyamines in roots and leaves of rice plants under cadmium stress. Successful quantitation of polyamines in minute...
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Utility of High Resolution Accurate Mass Spectrometry (HRMS) in the Mass Isotopomer Distribution Analysis (MIDA) of CSF Proteins Modified by Stable Isotope Labeling in Mammals (SILAM) Methodology Applied to Neurodegenerative Diseases

RSC - Anal. Methods latest articles - Mon, 05/08/2017 - 05:39
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00869D, PaperJoseph Cantone, Craig Polson, Cong Wei, Valerie Guss, Michael Ahlijanian, Jere Meredith, Dieter Drexler
The research on neurodegenerative diseases is challenged by accurate disease diagnosis and evaluation of treatment response, thus there is a need for indicators at the molecular level, specifically biomarkers, that...
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Functionalization of gold nanoparticles with Nanobodies through physical adsorption

RSC - Anal. Methods latest articles - Mon, 05/08/2017 - 05:39
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00854F, PaperJulie Goossens, Hla Sein, Shaogong Lu, Magdalena Radwanska, Serge Muyldermans, Yann G. J. Sterckx, Stefan Magez
Nanobodies (Nbs) are single-domain antibodies with highly desirable properties employed as versatile tools in structural biology, biochemistry and biomedical sciences. Nbs also have a significant potential for the development of...
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Instrument-free quantitative detection of alkaline phosphatase using paper-based devices

RSC - Anal. Methods latest articles - Mon, 05/08/2017 - 05:39
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00599G, Technical NoteLang Zhang, Jinfang Nie, Huili Wang, Juanhua Yang, Bingyue Wang, Yun Zhang, Jianping Li
Almost all the existing assay methods for alkaline phosphatase (ALP) require expensive analytical instruments and well-trained users to achieve quantitative results. This work initially describes a quantitative ALP assay that...
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Spectroscopy Study of the Interaction between Endocrine Disruptor 4-OH-2, 2', 3, 4'-BDE and Human Serum Albumin

RSC - Anal. Methods latest articles - Mon, 05/08/2017 - 05:39
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00419B, PaperZhi-Tiao Chen, Shuisheng Hu, XiaoYan He, Longhua Guo, Bin Qiu, Zhenyu Lin, Guonan Chen, Zongwei Cai
Hydroxylated polybrominated diphenyl ethers (OH-PBDEs), as one of the derivative of polybrominated diphenyl ethers (PBDEs), have received extensive concern recently. In this paper, the interaction of OH-PBDEs and human serum...
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Real-Time Assay of Inorganic Pyrophosphatase Activity in Red Region Based on Li+-doped NaYF4:Yb,Er Upconversion Luminescence Nanoparticles

RSC - Anal. Methods latest articles - Mon, 05/08/2017 - 04:37
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00444C, Paper Lei Wang, Yuan Ji, Yuezhen He, Lun Wang, Hongqi Chen
Li+-doped NaYF4:Yb,Er upconversion luminescence nanoparticles (UCLNPs) were synthesized and modified with poly(acrylic acid) (PAA). The luminescence of the carboxyl-functionalized UCLNPs at 664 nm was quenched in the presence of cupricion...
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Enabling lateral transport of genomic DNA through porous membranes for point-of-care applications

RSC - Anal. Methods latest articles - Fri, 05/05/2017 - 11:17

Anal. Methods, 2017, Advance Article
DOI: 10.1039/C7AY00293A, PaperSamantha A. Byrnes, Joshua D. Bishop, Paul Yager
Simultaneous cell lysis and DNA fragmentation to allow for controllable lateral transport of DNA through commonly-used porous membranes.
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Label-free fluorescence assay for rapid detection of RNase H activity based on Tb3+-induced G-quadruplex conjugates

RSC - Anal. Methods latest articles - Fri, 05/05/2017 - 07:16
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00709D, PaperKefeng Wu, Changbei Ma, Haisheng Liu, Hailun He, Weimin Zeng, Kemin Wang
Ribonuclease H (RNase H), a highly conserved damage-repaired protein, hydrolyzes RNA in DNA:RNA hybrid duplex and break RNA/DNA junctions. In this study, we demonstrated a unique Tb3+-based fluorescence assay that...
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A Coaxial Extractive Electrospray Ionization Source

RSC - Anal. Methods latest articles - Fri, 05/05/2017 - 07:16
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00835J, PaperKenneth D Swanson, Anne L Worth, Gary L Glish
An extractive electrospray ionizaton (EESI) source design is presented to improve the reproducibility of the interactions occurring in EESI. This design uses three concentric capillaries to deliver solvent, sample and...
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Design of a Ratiometric Fluorescent Probe for Naked Eye Detection of Dopamine

RSC - Anal. Methods latest articles - Fri, 05/05/2017 - 06:16
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00755H, PaperMohammad Reza Hormozi Nezhad, Mohammad Amin Farahmandnejad
A simple and effective ratiometric fluorescence sensor for selective detection of dopamine (DA) in alkaline media has been developed by simply mixing thioglycolic acid functionalized orange fluorescent cadmium telluride (CdTe)...
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DART-MS analysis of inorganic explosives using high temperature thermal desorption

RSC - Anal. Methods latest articles - Thu, 05/04/2017 - 14:11
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00867H, PaperThomas P Forbes, Edward Sisco, Matthew Edward Staymates, Greg Gillen
An ambient mass spectrometry (MS) platform coupling resistive Joule heating thermal desorption (JHTD) and direct analysis in real time (DART) was implemented for the analysis of inorganic nitrite, nitrate, chlorate,...
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Alkaline solubilization and ultrasound assisted extraction for Cr and Pb determination in leather by atomic absorption spectrometry

RSC - Anal. Methods latest articles - Thu, 05/04/2017 - 11:10
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00246G, PaperJunior Van Beik, Vitor Sena Kosera, Tatiane de Andrade Maranhao, Eduardo Sidinei Chaves
Alkaline solubilization with tetramethylammonium hydroxide (TMAH) and ultrasound-assisted extraction sample preparation procedures were evaluated for extraction and subsequent determination of Cr and Pb in leather samples by flame atomic absorption...
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A simple and efficient fluorescent probe for rapid detecting H2S in living cells and on agar gels

RSC - Anal. Methods latest articles - Thu, 05/04/2017 - 10:10
Anal. Methods, 2017, Accepted Manuscript
DOI: 10.1039/C7AY00499K, PaperHaitao Li, Yaqian Li, Biao Gu, Wei Su, Xiaoli Duan, Hai Xu, Zhen Huang, Shouzhuo Yao
A simple fluorescent probe (E)-1,3,3-trimethyl-2-(4-morpholinostyryl)-3H-indol-1-ium iodide (Mi) based on intramolecular charge transfer (ICT) was synthesized. The probe can sense hydrogen sulphide (H2S) rapidly and sensitively with low detection limit (15...
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