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Statistics in Analytical Chemistry: Part 5—Calibration: Calibration design
Monday, June 02, 2003
David Coleman Lynn Vanatta
With many things in life, the quality and usefulness of the outcome depends in large measure on the care with which the event is planned. read more
Statistics in Analytical Chemistry: Part 4—Calibration: Uncertainty intervals
Monday, March 03, 2003
David Coleman Lynn Vanatta
As was discussed in the previous column of this series (in the January 2003 issue of American Laboratory), calibration is a procedure that imperfectly transforms a response into a useful measurement. read more
Statistical Outliers in the Laboratory Setting
Monday, March 03, 2014
Steven Walfish
Statistical outlier identification and remediation is a topic that has caused issues in almost every laboratory. There are many causes of outliers, including measurement error, sampling error, ... read more
State-of-the-Art Separations With Convergence Chromatography
Thursday, March 07, 2013
Robert L. Stevenson, Ph.D.
Supercritical fluid chromatography (SFC) has many potential advantages, including rapid separation of chiral analytes and separation by hydrocarbon class (i.e., saturates, olefins, and aromatics). Yet... read more
Spill Prevention: Engineering Decreased Risk of Uncontained Chemical Spills
Monday, June 13, 2011
Vincent W. Caruso Edward C. Brown John P. Kay Michael A. Mancini James A. Westra Philip Keyes
Safe solvent management and storage are significant concerns in the pharmaceutical industry, particularly when purification systems are run unattended and are supplied by large volumes of organic... read more
Specifying a Water Purification System for the Laboratory
Thursday, November 07, 2013
Steve Mines
The selection, operation, and maintenance of a reverse osmosis (RO) water purification system should be straightforward. However, systems are often 1) inaccurately specified, i.e., not matched to the... read more
Solutions for Global Health and Well-Being
Sunday, February 01, 2009
Sandra Rasmussen
From investigating mercury-laden tuna sushi in Manhattan to high-profile recalls of contaminated toys and international concern over the quality of water and air in the 2008 Olympic Village, meeting ... read more
Sizing Particles
Tuesday, November 01, 2005
Michael Levin
Many methods and numerous instruments are available from recognized vendors to measure particle size. read more
Simultaneous Determination of Neutral and Anionic Analytes With a Single Column: Method Development Examples Using a Reversed-Phase/Weak Anion Exchange Mixed-Mode Column
Saturday, October 01, 2011
Xu Qun Chen Jing Jeffrey Rohrer
Many samples contain not only neutral hydrophobic analytes, commonly determined using reversed-phase (RP) HPLC, but ionic analytes. read more
Simultaneous Determination of Hormone Residues in Aquatic Products by UPLC-ESI-MS-MS
Tuesday, June 01, 2010
Ying Jiang Xu Xiu Hui Tian Xiu Zhen Zhang Xiang Hong Gong Shi Juan Zhang Hui Hui Liu Li Min Zhang
Hormones, such as androgens (AS), estrogens (ES), and progestogens (PS), play an important role in organisms. AS, the main male sex steroids,which are the critical factors responsible for the ... read more
Simply Intelligent: A Next-Generation Chromatography Data System
Thursday, February 26, 2009
James A. Schibler Fraser McLeod
Chromatography data systems perform many complex tasks, including instrument control, data capture, qualitative and quantitative data analysis, and report generation. To perform these tasks ... read more
Simplified Detection of Proteins in the Picogram and Femtogram Range
Monday, March 01, 2010
Paula Maia Helen M.M. Webster Seth Harkins
Western blotting is one of the most commonly used applications in protein research. read more
Seventh Annual Semantic Technology Conference (SemTech 2011): Natural Language Processing Catches up to Large-Scale Integration
Thursday, June 23, 2011
Robert L. Stevenson, Ph.D.
In 2009, when I attended the Semantic Technology Conference in San Jose, CA, the meeting was a mixture of software developers and applications reports. Many were from scientists seeking to improve ... read more
$Setting New Standards for Laser Diffraction Particle Size Analysis$
Setting New Standards for Laser Diffraction Particle Size Analysis
Thursday, January 07, 2010
Alan Rawle Paul Kippax
The newly released revised standard for laser diffraction particle size analysis, ISO13320:2009, contains valuable advice for those seeking to optimize their use of the technique. This article ... read more
Separation Science: Do We Always Need Gas Chromatography-Mass Spectrometry (GC-MS)?
Monday, October 01, 2012
Robert L. Stevenson, Ph.D.
In all too many applications of gas chromatography (GC), there is a need for supporting confirmation of a result. read more
Separation Science Highlights From Pittcon® 2011
Tuesday, May 10, 2011
Robert L. Stevenson, Ph.D.
At Pittcon® 2011, most new products appeared to be evolutionary, not revolutionary. read more
Separation of Spinach Chloroplasts Using a Large-Volume, Fixed-Angle Rotor
Thursday, May 29, 2008
O. Mitch Griffith
Chloroplasts were successfully separated by centrifugation in a sucrose density gradient into particle fractions using a zonal rotor. read more
Semantic Web Technologies as a Key to Successful Federation of Data in Life Science Organizations
Monday, September 22, 2014
Marc Lieber
The RDF Semantic Web has become an important player over the years in regard to federating different data sources using a common query federation tool, SPARQL. W3C SPARQL is now established as a ... read more
Selective Enrichment of Cytoskeleton-Associated Proteins for Detailed Protein Biochemical Analysis
Saturday, October 01, 2011
Haizhen Liu Karyn Huryn Jun Ma Luke Armstrong
The actin cytoskeleton mediates a variety of essential biological functions in all eukaryotic cells, including structural support and intra- and extracellular movement. read more
Selection and Development of Bulk Liquid Dispensing Technology
Saturday, September 01, 2007
Jason Greene
A vast majority of research is dependent on the transfer of a measured volume of liquid from one vessel to another, such as from a bulk container to a microplate. read more