An all-glass gas chromatograph was developed for the analysis
of corrosive metal halides. Included in the apparatus is a new liquid
sampling system designed for fast repetitive sampling of corrosive
liquids in an inert atmosphere. A flame photometer detector was developed
to permit the detection of corrosive solutes in the...
Gradient elution chromatography is frequently used for the preparative separation
of peptides and proteins. Separations at high loadings are often avoided because peaks
become asymmetrical and saturate the detector. However, non-linear interactions which
become important at high loadings may actually improve the separation with greater
concentrations of the product being...
Optimization of preparative nonlinear chromatography was carried out for
the first time for a biomolecule mixture. Conventional wisdom on optimization,
which roots from analytical chromatography, dictates optimizing resolution in an
analytical column and obtaining similar separation in a large column for isolation.
Such a method of optimization significantly under uses...
The use of gas chromatography for the separation, comparison,
and subsequent identification of flavor volatiles from food
products has proven highly successful in recent years. The
development of various techniques for the concentration of the
volatiles before gas chromatographic analysis has greatly extended
the use of this important analytical tool....
This is the first detailed chromatographic examination of Pseudotsuga menzesii and three other Pseudotsuga species (P. macrocarpa, P. japonica, and P. wilsoniana). The whole bark of these four species was sequentially extracted with hexane, benzene, ethyl ether, ethyl alcohol and water. Paper and thin layer chromatographic techniques were coupled with...
Ion exchange chromatography methods which have been
developed in recent years appear to offer a sensitive technique that
can be utilized very advantageously in studies on various proteins
and their properties. The application of such a procedure for the
successful fractionation of bovine sarcoplasmic proteins should stimulate
interest and research...
An analytical technique has been developed for the determination of methylmercury compounds in environmental samples. The technique is based on a two-stage procedure. In the first stage, methylmercury compounds are isolated from the sample matrix as methylmercury chloride (MeRgCl) by distillation. The distillation procedure is based on a series of...