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Salt in wooden bowl on dark stone table. Sea salt on black background. | Image Credit: © Milan - stock.adobe.com

Vibrational spectra of six new hexafluorosilicate salts containing different amino acids (glycine (Gly), sarcosine (Sar), dimethylglycine (DMG), betaine (Bet), β-alanine (β-Ala) and l-proline (l-Pro)) are typically recorded and discussed on the basis of their structures. The presence of cations, dimeric cations with short hydrogen bonds, and hexafluorosilicate anions is reflected in the spectra.

Cuong Cao from the Institute for Global Food Security at the School of Biological Sciences of Queen’s University in Belfast and his team of researchers conducted a preliminary exploratory study and detected the presence of MPs by automated Raman spectroscopy and subsequently NPs by using nanoparticle-on-film SERS (NPoF SERS) substrate released from chewing gum base plastic, a technique that has potential in screening a varied array of environmental pollutants, as well as a point-of-site tool when coupled with a handheld Raman instrument. Cao spoke to Spectroscopy about this work, and the resulting paper.

Lush green plant thriving in nutrient-rich soil, growth, vibrant, gardening, plant, healthy. Generated with AI. | Image Credit: © Andaman - stock.adobe.com

Researchers have developed a novel three-step hybrid variable selection strategy, SiPLS-RF(VIM)-IMIV, to enhance the accuracy and efficiency of soil potassium measurement using near-infrared spectroscopy, offering significant advancements for precision agriculture and real-time soil monitoring.

Spectroscopy sat down with Benjamin Manard, senior R&D staff and group leader for chemical and isotopic mass spectrometry at Oak Ridge National Laboratory, to discuss his career in the National Laboratory system, and his advice for scientists interested in following a similar path.

Stunning abstract visualization of dynamic atoms and molecules for scientific research and technology concepts. Generated with AI. | Image Credit: © pranee - stock.adobe.com.

It has occurred to me that, in the 10+ years I have been writing about molecular vibrations, I have never introduced my readers to its basic theory! I will rectify that now. Some of this is new material, and some will be review. Either way, it is important that all this material be covered in one place.