Process Control and Analysis

Determination of the Degree of Cure of a Varnish

January 08, 2016

Spectroscopy

Modern paints and varnishes are complex mixtures and the optimization of the material properties is an important task. One of the most essential variables is the curing which should in most cases take place in a reasonably short time span that can range from a fraction of a second to many days. It is difficult to evaluate the degree of the curing and its completeness by visual inspection. Therefore, an unbiased and reliable quantitative analysis is needed in quality control but also in R&D to optimize the varnish or the curing method respectively.

Bioprocess Monitoring with Ultrasound-Enhanced ATR Mid-IR Spectroscopy

June 18, 2012

Spectroscopy

Bernhard Lendl and Cosima Koch of the Vienna University of Technology have developed a new method for on-line monitoring of fermentations using mid-infrared spectroscopy.

Analysis of Solar Silicon Using High-Throughput Spectroscopy

August 01, 2009

Special Issues

Infrared spectroscopy is a powerful analysis technique used in the semiconductor industry to ensure the quality of silicon and silicon wafers. The authors discuss the use of an inexpensive, lab-based system to measure carbon and oxygen concentrations in silicon to the level of precision required by the solar silicon industry.

Ion Mobility-Mass Spectrometry: A Tool for Characterizing the Petroleome

April 01, 2009

Spectroscopy

The authors demonstrate the capacity to separate petroleum-derived molecules having the same nominal mass in the mobility dimension using IM-MS spectrometry.

The Use of Process Analytical Technology in Biofuels Production

September 01, 2008

Spectroscopy

Biofuels such as biodiesel and bioethanol are now the main alternatives to fossil fuels in one of the most pollutant human activities: transportation. The authors report on the use of process analytical technology for mapping raw materials, fingerprinting process trajectories, and calibrating for the most important quality specifications, both for individual chemical and physical attributes or for combined quality attributes, thusleading to more consistent and economically viable processes.

Process Monitoring: In-line, At-line, or Slip-stream?

February 01, 2006

Spectroscopy

As process analytical technology (PAT) moves out of the laboratory and into the plant and to the process stream itself, the question arises, "What is the best way to collect data from stream samples?" The author shows that this depends upon both the nature of the stream and the components to be measured.