Technical Articles

The proliferation of forensic DNA testing and databases by state and local jurisdictions was recently reported by Joseph Goldstein in The New York Times. For years, the FBI’s combined indexing system ... read more

Ultra high-performance liquid chromatography, or UHPLC, is faster and provides higher resolution compared to conventional HPLC. This article discusses UHPLC operation, from sample through detection, ... read more

It is possible to associate a relative standard deviation or the more general relative measurement uncertainty (RSD and RMU, respectively) with a detection limit (DL). read more

Raman spectroscopy is a useful tool for differentiating sugars and other sweeteners used in pharmaceutical and chemical manufacturing. read more

The mechanical, pressure, and ultrasonic homogenizer represent the three primary methods used to blend, mix, disrupt, emulsify, disperse, and stir samples. This article explains the role of ... read more

The enantiomeric composition of proline is commonly determined using conventional analytical methods such as HPLC, GC, and CE. read more

Instrumentation has a life cycle. Gas chromatographs are mature, so the cycle is probably 10–12 years. read more

The United States Food and Drug Administration (FDA) regulates, but is not limited to, the food, drug, and medical device industries, which are subject to the Federal Food, Drug and Cosmetic Act (FD&... read more

October 1988: I remember it well. My lab overlooked the parking lot at Varian Associates. We were expecting a visit from Bill Wham and Ken Halaby, the founders of American Laboratory magazine. read more

The story of biofuels begins with biomass. Simply stated, biomass is any plant or animal material of recent origin, as opposed to plant or animal material that, over millennia, has transformed ... read more