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Title
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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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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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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Theory and Practical Applications of Automation Solutions in Analytical Measurements
Wednesday, July 24, 2019
Heidi Fleischer
Kerstin Thurow
Automated systems for sample preparation and analytical measurements must follow special protocols due to their complex process structure with multiple subprocesses.
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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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Urinary Drug Testing: Small Changes for Big Improvements in Sensitivity
Tuesday, September 27, 2016
Jenny Cybulski
An oversight or mistake in drug testing can have dire consequences—a positive drug test can ruin the possibility of employment, turn an accident into a lawsuit, or cause a physician to discontinue ...
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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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What Are Emerging Contaminants and Why Are We Concerned?
Friday, April 05, 2019
William Lipps
The term “compounds of emerging concern” (CEC) is used to identify chemical contaminants that have no regulatory standard, have been found in environmental samples, and have potentially adverse ...
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