Spectroscopy-06-01-2009

This article describes the application of chemometric methods and statistics for reporting clinical quantitative measurement methods. The equations and terminology are consistent with the Clinical and Laboratory Standards Institute (CLSI) guidelines. These chemometric and statistical methods describe the accuracy and precision of a test method compared to a reference method for a single analyte determination. Part I will introduce these concepts and Part II will discuss the statistical underpinnings in greater detail.

Infrared (IR) spectroscopy and Raman spectroscopy are very complementary methods. The strongest demand tends to come from applications that require analytical information from a potentially broad range of compounds and functional groups. The global market for combined Raman and FT-IR accounts for a small but growing percentage of both the broader IR and Raman spectroscopy markets.

The GAMP (Good Automated Manufacturing Practice) guide version 5 was released in March 2008 and one of the changes was that the classification of software was revised - again. This column will look at what the changes mean for the laboratory and whether all of these should be implemented.

Product Resources

The interaction of [Ru(2, 2'-bipyridine)2(2-benzo[b] thien-2-yl-1H-imidazo[4,5-f][1,10] phenanthroline)]2+ ([Ru(bpy)2(BTIP)]2+) with nucleic acids in weak acidic medium is studied based upon the measurements of resonance light scattering (RLS) and UV–vis absorbance.

The United States Army Research Laboratory (ARL) has been applying standoff laser-induced breakdown spectroscopy (LIBS) to hazardous material detection and determination. We describe several standoff systems that have been developed by ARL and provide a brief overview of standoff LIBS progress at ARL. We also present some current standoff LIBS results from explosive residues on organic substrates and biomaterials from different growth media. These new preliminary results demonstrate that standoff LIBS has the potential to discriminate hazardous materials in more complex backgrounds.

Some forms of spectroscopy involve actions other than measuring a property of light. In the case of this form of spectroscopy, the energies of emitted electrons are measured.

Click the title above to open the Spectroscopy June 2009 regular issue, Vol 24 No 6, in an interactive PDF format.