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Date Published
Title
High-Speed Zone Refining
Thursday, June 16, 2016
Julie DeCook
Zone refining is a process in which organic and inorganic compounds are purified.
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Ion-Exchange Selectivity and High-Resolution Accurate-Mass Spectrometry Elucidate Lithium-Ion Battery Degradation Pathways
Monday, May 09, 2016
Christopher Pohl
Charanjit Saini
Rosanne W. Slingsby
Paul J. Voelker
Kate Comstock
John Moote
Michael P. Balogh
Ramona Y. Ying
Improved performance and lifetime of lithium-ion batteries is important for automobile manufacturers that produce cars powered electrochemically by lithium-ion battery packs.
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Determination of Sulfur Compounds in Natural Gas and Gaseous Fuels by Gas Chromatography and Pulsed Flame Photometric Detection
Friday, February 19, 2016
Cynthia Elmore
Michael Duffy
The carbonated beverage and petrochemicals industries are just some areas in which the analysis of volatile sulfur-containing compounds in process streams is a critical quality-control step.
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Statistics in the Laboratory: Control Charts, Part 1
Tuesday, January 26, 2016
Stanley N. Deming
Statistical process control (SPC) charts were introduced briefly in the previous column (October 2015).
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Computer-Assisted Structure Elucidation in Routine Analysis
Tuesday, January 26, 2016
Patrick Wheeler
Steve Hayward
Mikhail Elyashberg
The elucidation of unknown structures, especially those with novel moieties found in natural products, often results in initially incorrect published structures, which then require either exhaustive ...
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Recent Advances in ICP Spectrometers
Monday, September 28, 2015
Mark Grey
When SPECTRO Analytical Instruments (Kleve, Germany) sought to redesign its inductively coupled plasma (ICP) spectrometer instrument line, the company’s engineers worked to address some very specific ...
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Statistics in the Laboratory: A New American Laboratory Column
Friday, September 25, 2015
Stanley N. Deming
Welcome to “Statistics in the Laboratory.” This column will appear four times a year and will build on the popular “Statistics in Analytical Chemistry” series by David Coleman and Lynn Vanatta ...
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Five Ways to Improve the Workflow and Financial Health of the Laboratory
Friday, September 25, 2015
Trish Meek
Henry Ford quipped, “There are no big problems; there are just a lot of little problems.”
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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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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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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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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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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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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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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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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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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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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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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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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 (...
Read More
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