LCGC Europe-12-01-2014

Synthetic oligonucleotides have become increasingly popular as a result of the recent discovery of ribonucleic acid interference (RNAi), a natural process for silencing gene expression.

This study presents results of gel permeation chromatography (GPC) and analytical temperature rising elution fractionation (TREF) of polyethylene in butylal (dibutoxymethane, a halogen-free solvent).

The use of a mass spectrometer in quantitative analysis exploits its exquisite selectivity and sensitivity as a detector, allowing a signal to be ascribed to a particular chemical entity with high certainty, even when present in a sample at a low concentration. There are, however, some special considerations that are necessary when a mass spectrometer is used as a quantitative tool.

This article describes a new, single method to replace the two-method approach using United States EPA Methods TO-15 and TO-13A for the analysis of both VOCs and SVOCs in air.

Click the title above to open the LCGC Europe December 2014 regular issue, Vol 27, No 12, in an interactive PDF format.

In this article, we discuss the role of the gradient in protein separations by reversed-phase and ionexchange high performance liquid chromatography (HPLC).

This study presents results of gel permeation chromatography (GPC) and analytical temperature rising elution fractionation (TREF) of polyethylene in butylal (dibutoxymethane, a halogen-free solvent).