The Column-05-12-2014
Increased Ozone Levels Linked to Oil and Gas Emissions
May 14th 2014A study published in the journal Environmental Science and Technology suggests a strong link between oil and gas emissions and the high production of ozone in the atmosphere during the winter months in the Uintah Basin in Utah, USA.1 Scientists from the Institute of Arctic and Alpine Research (INSTAAR) at the University of Colorado in the USA performed continuous measurements of ozone, methane, and a suite of nonmethane hydrocarbons (NMHCs) above the basin between January and February in 2012 and 2013.
Steroid Analysis Without Derivatization
May 14th 2014Steroid testing is commonly associated with sports doping testing to monitor athletes for performance-enhancing compounds, but it also important in the food industry for consumer safety. A new method using high-temperature liquid chromatography with photodiode detection and isotope ratio mass spectrometry (HT?LC?PDA?IRMS) that does not require sample derivatization and uses water as the eluent has been developed by scientists at the University of Duisberg-Essen in Essen, Germany.1
Solid-Phase Extraction and LC–MS Analysis of Benzodiazepines in Urine
May 12th 2014Benzodiazepines are extensively misused as a result of their hypnotic-sedative properties and relative availability, and they are often used in combination with other drugs, which can result in life-threatening conditions. This article presents a SPE and LC–MS method for the analysis of benzodiazepines in synthetic urine samples.
