Spectroscopy-10-01-2013

A novel infrared-based method that permits fast and impartial analysis of detergent removal from biological samples is presented.

The statistical methods used for evaluating the agreement between two or more instruments (or methods) for reported analytical results are discussed, with an emphasis on acceptable analytical accuracy and confidence levels using two standard approaches, standard uncertainty or relative standard uncertainty, and Bland-Altman "limits of agreement."

The physics that determine how gratings and spectrographs work are summarized in simple terms for new users of Raman equipment.

At the fringe of the infrared spectrum is the terahertz region, which until recently was not significantly utilized for spectroscopy.

In a recent web seminar, Julian Tyson, professor of chemistry at the University of Massachusetts, Amherst, explained how to develop a reliable method for arsenic speciation. Here, he answers questions raised during the seminar.

Click the title above to open the Spectroscopy October 2013 regular issue, Vol 28 No 10, in an interactive PDF format.