Authentication of Pisco: From origin to alcohol content with Raman

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Raman spectroscopy is emerging as a rapid, portable tool to test premium liquors for evidence of adulteration or substitution –problems relevant in the rising production of pisco in Peru, where the liquor must originate from specific grape varieties and regions. Here we demonstrate the ability of 1064 Raman to distinguish pure pisco from mixtures, identify the specific grape variety, and quantify both ethanol and methanol content with a high degree of accuracy – thus validating origin, quality, and safety.

Determination of Chromaticity Coordinates and Bandgaps of III-V LEDs Using Electroluminescence Spectroscopy

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In 1907 English engineer Henry Joseph Round was testing the rectifying current behaviour of SiC crystallites and noticed that a faint yellow light was emitted from the SiC; this was simultaneously the first reported observation of the phenomena of electroluminescence spectroscopy and the first successful operation of a light emitting diode (LED). The work of Round was expanded on by a few others in the early 20th century, but it would take many decades for LEDs to become efficient enough for practical use.

UV/VIS Spectroscopy Applications in Chemistry

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UV/VIS spectroscopy refers to absorption/reflection measurements performed in the ultraviolet and visible light spectrum and is one of the common tools in many a chemist’s tool box. This versatile measurement technique has a secure place in the chemistry lab. Read more to learn how spectroscopy is empowering today’s chemistry and nanotechnology research.

Making flying safer

Optical explosive detection is set to help remove restrictions on the liquids airline passengers can carry on, finds Andy Extance


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