The Application Notebook-02-01-2012

By identifying maturation tracers and molecules commonly responsible for taste defects, gas chromatography–mass spectrometry (GC–MS) augments expert opinion with objective and quantitative information. When using a solid phase micro extraction (SPME) method, GC–MS requires very small sample sizes and a minimum of sample preparation while providing rapid analysis of target molecules. GC–MS can provide an automated technique with repeatable results for detecting all of these compounds.

Saccharides are fundamental substances that express various bioactivities and may exist independently or form complexes with proteins or lipids.

Blueberries are extracted into acidified methanol and analyzed for anthocyanins with a methanol/formic acid gradient via UHPLC/MS; four different Agilent ZORBAX RRHD stationary phases are quickly evaluated.

Resistive glass tubes and plates are designed to guide ions by generating a uniform electric field. PHOTONIS resistive glass products are composed of a proprietary lead silicate glass that has been specially processed to create a resistive layer at the surface. The resistivity can be varied over several orders of magnitude to suit the specific application.

Basic compounds often require basic additives in the modifier to improve peak shape and resolution in SFC (1). These additives can be difficult to remove post-purification (2).

Click the title above to open the LCGC North America February 2012 Application Notebook, Vol 30 No s2, in an interactive PDF format.