NIST Researchers Create New Electronic Nose Approach
Researchers at the National Institute of Standards and Technology (NIST, Gaithersburg, Maryland) have developed an approach for electronic noses that comprises 16 microheater elements and eight types of sensors.
Researchers at the National Institute of Standards and Technology (NIST, Gaithersburg, Maryland) have developed an approach for electronic noses that comprises 16 microheater elements and eight types of sensors. Electronic noses are based on interactions between chemical compounds and semiconducting sensing materials placed on top of microelectromechanical systems (MEMS) microheater platforms developed at NIST. The sensors in the current effort consist of oxide films deposited on the surfaces of the microheaters, with two copies of each material. By controlling the individual heating elements, each of them can be treated as a collection of virtual sensors at 350 temperature increments between 15 °C and 500 °C. The electronic nose must be “trained” to recognize the chemical signatures of various smells before it can be used to detect unknown compounds.
Best of the Week: Food Analysis, Chemical Migration in Plastic Bottles, STEM Researcher of the Year
December 20th 2024Top articles published this week include the launch of our “From Lab to Table” content series, a Q&A interview about using liquid chromatography–high-resolution mass spectrometry (LC–HRMS) to assess chemical hazards in plastic bottles, and a piece recognizing Brett Paull for being named Tasmanian STEM Researcher of the Year.
Using LC-MS/MS to Measure Testosterone in Dried Blood Spots
December 19th 2024Testosterone measurements are typically performed using serum or plasma, but this presents several logistical challenges, especially for sample collection, storage, and transport. In a recently published article, Yehudah Gruenstein of the University of Miami explored key insights gained from dried blood spot assay validation for testosterone measurement.
Determination of Pharmaceuticals by Capillary HPLC-MS/MS (Dec 2024)
December 19th 2024This application note demonstrates the use of a compact portable capillary liquid chromatograph, the Axcend Focus LC, coupled to an Agilent Ultivo triple quadrupole mass spectrometer for quantitative analysis of pharmaceutical drugs in model aqueous samples.
