Extending the Range of MCT Focal Plane Arrays-Based Imaging Systems to Near IR Imaging Applications

Near-infrared spectroscopy combined with principal components analysis and a back propagation neural network identified Huanglongbing-infected Gannan navel orange leaves with an overall accuracy of 98.75%, outperforming LDA, KNN, and SVM models.

UV-vis absorption spectroscopy, one of analytical chemistry's oldest and most accessible techniques, remains foundational to cutting-edge science, underpinning the Nobel Prize-winning discovery and synthesis of quantum dots and continuing to evolve through ultralow stray-light optics, chip-scale sensors, and AI-integrated process analyzers.

The following articles are the most accessed digital object identifier (DOI) manuscripts for Spectroscopy and LCGC International during the month of September 2026. Nine articles are individually ranked here by DOI page views; the third-highest entry (186 views) was recorded against the bare journal-level DOI rather than an individual article and is therefore not attributable to a single manuscript.

Near-infrared (NIR) spectroscopy, built on the weak overtone and combination-band absorptions first exploited commercially in the 1970s, is now being reshaped by chip-scale MEMS sensors, rapid field calibration methods, and increasingly capable chemometric and machine-learning models.

SciX 2026, the annual conference presented by the Federation of Analytical Chemistry and Spectroscopy Societies (FACSS), ran October 4–9, 2026, at the Nugget Casino Resort in Sparks, Nevada. The program spanned atomic and molecular spectroscopy, mass spectrometry, chemometrics, and bioanalysis. This report follows the meeting day by day, from Monday's clinical Raman plenaries to Friday's closing talks, drawing on the online program and Spectroscopy coverage of award winners, highlighting efforts to move Raman, SERS, LIBS, and single-particle ICP-MS toward clinical, environmental, and field use.