May 14th 2024
Scientists from the Shenyang Pharmaceutical University in China have developed a new quality assessment system for various types of traditional Chinese medicine (TCM).
Characterization of Styrene–Butadiene Block Copolymers by Gel Permeation Chromatography
December 1st 1999The authors compare their results in analyzing styrene–butadiene block copolymers by gel permeation chromatography with other methods, such as Fourier transform infrared spectroscopy and pyrolysis gas chromatography.
A Coin-Toss Experiment, Part II – Limits of the Analogy
November 1st 1999In part I, Hinshaw described a simple experiment with coins to explain the statistical nature of separations and to impart a better understanding of the physical processes inside the column. In part II, he compares this coin-toss simulation with chromatographic columns and describes differences between the analogy and real-world situations.
Optimizing Separations Using Coupled Columns and Window Diagramming
October 1st 1999Analysts can optimize their separations by using combinations of two columns connected in series. This type of coupled column system produces peak separations that are a combination of separations obtained on each column.
Analysis and Fate of Surfactants in the Aquatic Environment
December 1st 3According to Analysis and Fate of Surfactants in the Aquatic Environment (Volume 40 of Wilson & Wilson's Comprehensive Analytical Chemistry), an understanding of the fate and behaviour of organic chemicals, such as surfactants?