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Title
Development of a 100% Dimethyl Sulfoxide (DMSO) Sample Solution for Liquid Handler Performance Verification
Friday, June 07, 2013
Rachel Parshley
John Thomas Bradshaw
Karl Olson
Dimethyl sulfoxide (DMSO) has become one of the most important solvents used for high-throughput screening (HTS) and compound management applications due to its ability to readily dissolve a wide ...
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A Novel Sensor for Uric Acid Based on an Electropolymerization Technique
Tuesday, July 02, 2013
Youyuan Peng
A molecularly imprinted polymer (MIP) film was fabricated using an electropolymerization technique after depositing carboxyl-functionalized multiwalled carbon nanotubes (MWNTs) onto a glassy carbon ...
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Rapid Characterization of Large Areas of Graphene Using Raman Spectroscopy
Thursday, August 29, 2013
Tim Batten
Raman spectroscopy probes the vibrations (phonons) in a material. These phonons are characteristic of a given material and allow its chemical and structural properties to be investigated.
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A Sensitive and Selective GC/MS Method for Analyzing Persistent Organic Pollutants Using a Novel Ionization Source
Friday, October 04, 2013
Jody Dunstan
Charge transfer chemical ionization (CI) was among the ionization types studied decades ago by researchers investigating fundamental Characteristics of chemical ionization. However, the technique was ...
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Bottle Liquid–Liquid Extraction Update: In Situ Water Sample Preparation
Tuesday, January 21, 2014
As first described in Ref. 1, an alternative liquid–liquid extraction technique was originally conceived, born, and cultivated in an environmental lab setting to enable holding time obligations to be ...
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How Solid-Phase Extraction Affects Challenges in Bioanalysis
Wednesday, February 05, 2014
Mike Oliver
Tim Liddicoat
Ken Meadows
Modern bioanalytical laboratories are tasked with providing high-quality analytical results from complex biological samples in a high-throughput environment. These needs have to be balanced with the ...
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Ensuring Data Integrity in Dropping Point Determination
Wednesday, March 12, 2014
Hans-Joachim Muhr
Softening and dropping point determination are established analytical tests that provide quality control for petrochemical products such as lubricating grease. However, to be accurate and comparable, ...
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How Electronic Laboratory Notebooks Aid in the Development of Bioanalytical Assays for Large Molecule Detection by LC/MS
Wednesday, April 16, 2014
Laura Swift
The use of electronic laboratory notebooks (ELNs) is becoming more popular among research and development (R&D) organizations. These electronic platforms optimize workflow and expedite data analysis ...
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Preparation of SMA/CaCO
3
/CaCl
2
@SiO
2
as a Fluid Loss Agent Based on PSA/Ca-MMT/CaCl
2
@SiO
2
Thursday, September 04, 2014
Xiuhua Zheng
Shiwei Yang
Zhongli Lei
A novel inorganic/organic hybrid, highly temperature-resistant fluid loss agent had previously been reported by the Drilling Fluid Laboratory of China University of Geosciences. However, Ca-MMT (...
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Portable Visible Absorption Spectrometry: Two Dimensions Instead of One
Wednesday, September 10, 2014
Alexander Scheeline
Think of a visible absorption spectrometer or a visible fluorimeter. What do you see? A scanned diffraction grating and photomultiplier?
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Analysis of Protosappanin B in Sappan Lignum by Capillary Zone Electrophoresis
Tuesday, September 23, 2014
Luzhi Sui
Xiangqian Hou
Xinmin Li
Dunqing Wang
Sappan Lignum, the dried heartwood of Caesalpinia sappan L, has been used as an herbal medicine since ancient times. Sappan Lignum promotes blood circulation; removes blood stasis; reduces swelling, ...
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Detecting and Managing Water Contaminants in the Laboratory
Thursday, October 16, 2014
Jim Keary
Water purity is a fundamentally important factor in many laboratories, yet it is frequently overlooked. Researchers use water in most lab processes, and poor water quality can quickly lead to ...
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The Importance of Monodisperse Silica in the Evolution of UHPLC and HPLC Column Performance
Tuesday, March 10, 2015
Richard A. Henry
Paul Ross
William R. Betz
Gaurang Parmar
Wayne K. Way
There is growing interest in the use of monodisperse particle-size distribution or PSD (here defined as having 10% RSD or less) to prepare modern HPLC columns because good correlation has been ...
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Evaluation of an Automated Solid-Phase Extraction Method Using Positive Pressure
Wednesday, April 08, 2015
Heidi Fleischer
Kerstin Thurow
Ellen Vorberg
Carolin Gallert
Thomas Roddelkopf
Steffen Junginger
Investigations for the determination of drugs in real samples, while gaining in importance, are limited by time and sample throughput. In response to this, the authors developed an automated solid-...
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Application of HPLC in the Synthesis of 2,4,5-Trifluorobenzoic Acid
Monday, April 20, 2015
Yun Wang
Wen-Yi Su
Yan-Li Xi
An important fine chemical intermediate for pharmaceuticals, agrichemicals and polymers, 2,4,5-trifluorobenzoic acid (2,4,5-TFBA) is synthesized from tetrachlorophthalic anhydride via hydrolysis, ...
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Portable Raman Microscopy: Laboratory-Quality Results Measured Anywhere
Wednesday, April 22, 2015
Barbara Foster
While handheld portable Raman is now well established, until recently, microRaman had yet to make the leap out of the laboratory and into the world at large. To meet that challenge, BioTools (Jupiter...
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Thin-Layer Chromatography/Mass Spectrometry Analysis of Sample Mixtures Using a Compact Mass Spectrometer
Tuesday, May 12, 2015
Changtong Hao
Nigel Sousou
Daniel Eikel
Jack Henion
Thin-layer chromatography (TLC) is a planar chromatographic technique used to separate the components of a mixture by employing a thin stationary phase supported by an inert backing. It can be ...
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Linear Transformation Applied to the Calibration of Analytes in Various Matrices Using a Total Hydrocarbon Analyzer
Friday, July 24, 2015
Michael T. Tang
Grace Feng
Greg Merideth
Rui Huang
Total hydrocarbon analyzers provide linear responses to methane and other hydrocarbons; however, the slope and intercept measurements are dependent on the matrix. This requires that calibration be ...
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Glycoxidative Modification of Adenosine in Relation to Diabetes and Obesity: Detection of Carboxymethyl-Adenosine in Biological Samples
Friday, August 07, 2015
Zeenat Ara Lila
Louis D. Whitesides
Chukudi Weze
Yazmine Thomas
Proteins are modified in residues of lysine, arginine, histidine, etc., due to high concentrations of sugar and fatty acids in the bloodstream in relation to diabetes.
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Use of Weighted Least Squares and Confidence Band Calibration Statistics to Find Reliable Instrument Detection Limits for Trace Organic Chemical Analysis
Friday, September 11, 2015
Paul R. Loconto
Instrument detection limits (IDLs or xD) obtained from applying either ordinary least squares/confidence band calibration statistics (OLS/CBCS) or weighted least squares/confidence band calibration ...
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