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Cantilever-enhanced photoacoustic spectroscopy coupled with gas chromatography is used to quantitatively analyze a mixture of alcohols in a quasi-online manner. A full identification and quantification of all analytes are achieved based on their spectral fingerprints using a widely tunable continuous-wave laser as a light source. This can be done even in the case of interfering column/septum bleed or simultaneously eluted peaks. The combination of photoacoustic spectroscopy and gas chromatography offers a viable solution for compact and portable instruments in applications that require straightforward analyses with no consumables.
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http://dx.doi.org/10.1021/acs.analchem.0c02887 | DOI Listing |
Nanoscale
September 2025
School of Biochemical Engineering, Indian Institute of Technology (BHU) Varanasi, Uttar Pradesh 221005, India.
Early-stage cancer diagnosis is considered a grand challenge, and even though advanced analytical assays have been established through molecular biology techniques, there are still clinical limitations. For example, low concentration of target biomarkers at early stages of cancer, background values from the healthy cells, individual variation, and factors like DNA mutations, remain the limiting factor in early cancer detection. Volatile organic compound (VOC) biomarkers in exhaled breath are produced during cancer cell metabolism, and therefore may present a promising way to diagnose cancer at the early stage since they can be detected both rapidly and non-invasively.
View Article and Find Full Text PDFInsect Sci
September 2025
CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, Yunnan, China.
Agarwood trees (Aquilaria spp.) are widely cultivated in tropical Asia for their valuable resin. The defoliator moth Heortia vitessoides Moore (Lepidoptera: Crambidae) is a devastating pest that significantly limits the productivity of agarwood plantations.
View Article and Find Full Text PDFMagn Reson Chem
September 2025
Jiangsu Institute for Food and Drug Control (JSIFDC), Nanjing, Jiangsu, China.
The research team established a quantitative H NMR method to determine the relative ethoxy content (EO%) in ethylcellulose using a CDCl/TFA-d solvent mixture. High-field NMR spectroscopy enabled direct measurement without the use of internal or external calibrants by integrating the methyl proton signals (δ 1.15 ppm) and the methylene/methine proton signals (δ 2.
View Article and Find Full Text PDFJ Hazard Mater
August 2025
Univ. Rennes, CNRS, Géosciences Rennes - UMR 6118, F-, Rennes 35000, France.
The increasing presence of nanoplastics (NPs) in terrestrial environments raises concerns about their bioavailability and potential impacts on crops. This study investigates the uptake and translocation of environmentally relevant polystyrene nanoplastics (eNPs-PS) in Hordeum vulgare L. via soil.
View Article and Find Full Text PDFJ Forensic Sci
September 2025
Laboratório de Ecologia Comportamental, Universidade Estadual de Mato Grosso do Sul (UEMS), Dourados, Mato Grosso do Sul, Brazil.
Blowflies are important to estimate the postmortem interval (PMI), since they are the first to interact with the carcass. However, depending on the decomposition stage, only pupae can be found. A method that has currently been suggested is the use of cuticular hydrocarbons (CHCs) in forensically important fly species to aid in estimating PMI; however, studies from the pupal stage are rare.
View Article and Find Full Text PDF