The authors continue their discussion of the correlation coefficient in developing a calibration for quantitative analysis.

The analytical challenges in marine chemistry are numerous due to the large number of natural toxins and their metabolites, the highly toxic nature of many of these compounds, and increasingly stringent regulatory guidelines. This article gives an overview of some recently developed mass spectrometry techniques and their application to marine biotoxins.

Dartmouth Medical School's recent Alternative Breast Imaging Project was comprised of three types of imaging techniques, including near infrared (NIR).

This column discusses the space charge effect, which is rooted in the physics of interaction between charged particles, with direct implications in MS instrument design and consequences in their performance.