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1,408 Newest Publications about the topic spectrometers

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Semi-quantification of Surface-enhanced Raman Scattering using a Handheld Raman Spectrometer: A Feasibility Study

18-09-2013 | Jinkai Zheng; Shintaro Pang; TP Labuza; Lili He, Analyst, 2013

The feasibility of utilizing a handheld Raman spectrometer for surface-enhanced Raman scattering detection was evaluated on the pesticide ferbam. A layman’s “answer box” was established for semi-quantifying the risk level of ferbam. This study advanced the application of a handheld Raman ...

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Development and evaluation of novel flavour microcapsules containing vanilla oil using complex coacervation approach

16-09-2013 | Author(s): Ziming Yang , Zheng Peng , Jihua Li , Sidong Li , Lingxue Kong , Puwang Li , Qinghuang Wang, Food Chemistry, 2013

Publication date: 15 February 2014 Source:Food Chemistry, Volume 145 Author(s): Ziming Yang , Zheng Peng , Jihua Li , Sidong Li , Lingxue Kong , Puwang Li , Qinghuang Wang A novel flavour microcapsule containing vanilla oil (VO) was developed using complex coacervation approach, ...

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Molecules, Vol. 18, Pages 11281-11298: Identification of Multiple Ingredients for a Traditional Chinese Medicine Preparation (Bu-yang-huan-wu-tang) by Liquid Chromatography Coupled with Tandem Mass Spectrometry

12-09-2013 | Shaw, Lee-Hsin ; Chen, Wei-Ming ; Tsai, Tung-Hu, Molecules, 2013

Bu-yang-huan-wu-tang (BYHWT) is a popular Traditional Chinese Medicine formula consisting of seven herbal medicines (Astragalus membranaceus, Angelica sinensis, Paeonia lactiflora, Ligusticum chuanxiong, Carthamus tinctorius, Amygdalus persica and Pheretima aspergillum), that has been used in ...

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A New Approach to Measuring Protein Backbone Protection with High Spatial Resolution Using H/D Exchange and Electron Capture Dissociation

12-09-2013 | Rinat R. Abzalimov; Cedric E. Bobst; Igor A. Kaltashov, Analytical Chemistry, 2013

Inadequate spatial resolution remains one of the most serious limitations of hydrogen/deuterium exchange-mass spectrometry (HDX-MS), especially when applied to larger proteins (over 30 kDa). Supplementing proteolytic fragmentation of the protein in solution with ion dissociation in the gas phase ...

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Application of orthogonal space regression to calibration transfer without standards

11-09-2013 | Zhaozhou Lin, Bing Xu, Yang Li, Xinyuan Shi, Yanjiang Qiao, Journal of Chemometrics, 2013

To transfer a calibration model in cases where the standardization samples are rare or unstable, a method based on orthogonal space regression (OSR) is proposed. It uses virtual standardization spectra to account for response changes between instruments or batches. A comparative study of the ...

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A high‐resolution X‐ray fluorescence spectrometer and its application at SSRF

10-09-2013 | Xing Gao, Songqi Gu, Qian Gao, Yang Zou, Zheng Jiang, Shuo Zhang, Xiangjun Wei, Haisheng Yu, Guodong Sheng, Peiquan ..., X-Ray Spectrometry, 2013

A high‐resolution X‐ray fluorescence spectrometer based on Rowland circle geometry was developed and installed at BL14W1 XAFS beamline of Shanghai Synchrotron Radiation Facility. The spectrometer mainly consists of three parts: a sample holder, a spherically curved Si crystal, and an avalanche ...

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Microscopy ambient ionization top-down mass spectrometry reveals developmental patterning [Biochemistry]

10-09-2013 | Cheng-Chih Hsu; Nicholas M. White; Marito Hayashi; Eugene C. Lin; Tiffany Poon; Indroneal Banerjee; Ju Chen; Samuel ..., Proceedings of the National Academy of Sciences current issue, 2013

There is immense cellular and molecular heterogeneity in biological systems. Here, we demonstrate the utility of integrating an inverted light microscope with an ambient ionization source, nanospray electrospray desorption ionization, attached to a high-resolution mass spectrometer to ...

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Oxidation of CO and NO on Composition-Selected Cerium Oxide Cluster Cations

10-09-2013 | Shinichi Hirabayashi; Masahiko Ichihashi, Journal of Physical Chemistry A, 2013

The collisional reactions of composition-selected cerium oxide cluster cations, CenOm+ (n = 2–6; m ≤ 2n), with CO and NO have been investigated under single collision conditions using a tandem mass spectrometer. At near-thermal energy, oxidation of CO and NO is observed only for the ...

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Influence of Different Planting Seasons of Six Leaf Vegetables on Residues of Five Pesticides

10-09-2013 | Sufang Fan; Kailin Deng; Chuanshan Yu; Pengyue Zhao; Aijuan Bai; Yanjie Li; Canping Pan; Xuesheng Li, Journal of Agricultural and Food Chemistry, 2013

To investigate the influence of different planting seasons on the dissipation of pesticides, field experiments of thiophanate-methyl, metalaxyl, fluazifop-P-butyl, chlorpyrifos, and λ-cyhalothrin on six crops including pakchoi, rape, crown daisy, amaranth, spinach, and lettuce were designed and ...

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Tandem LC columns for the simultaneous retention of polar and non‐polar molecules in comprehensive metabolomics analysis

09-09-2013 | Kenneth R. Chalcraft, Brian E. McCarry, Journal of Separation Science, 2013

Abstract The tandem use of hydrophilic interaction liquid chromatography columns with reversed phase columns in series configuration has resulted in the retention of both polar and non‐polar components in complex biological samples (mouse serum) in a single analysis. This approach successfully ...

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