Background Near-infrared (NIR) spectroscopy has been widely accepted for use in the food and agricultural areas, beginning with the work of Karl Norris at the USDA to develop quality methods for agricultural products. However, since NIR spectra are overtones and combinations of fundamental IR spectra, the peaks tend to lose definition and broaden, representing general features due to CH, NH and...

Executive Summary The overall purpose of this project was to develop a field protocol for testing two field-portable near-infrared (NIR) spectrophotometers as on-site, free-standing (not in-line), measurement tools for nutrients in hog manure at the time of application of manure to agricultural land. This project is a developmental step between the analysis of hog manure in the laboratory using...

Walk through the majority of R&D departments and quality laboratories and you will see FTIR, near-infrared (NIR) and Raman spectrometers aplenty. These now ubiquitous instruments are used to support the manufacture and development of a vast range of products of all shapes and sizes and material types from pharmaceuticals to pasta, paint, petroleum and polymer films. A single spectrometer can be...

BACKGROUND Lean body mass (LBM) is an important nutritional measure representing muscle mass and somatic protein in hemodialysis patients, for whom we developed and tested equations to estimate LBM. STUDY DESIGN A study of diagnostic test accuracy. SETTING & PARTICIPANTS The development cohort included 118 hemodialysis patients with LBM measured using dual-energy x-ray absorptiometry (DEXA)...

The feasibility of using a portable near-infrared (NIR) spectrometer combined with partial least squares for discrimination analysis (PLS-DA) to identify five similar Cinnamomum wood species was investigated. To improve model reliability and identification accuracy, the effects three main spectra preprocessing methods their combinations were examined. Then, performance created by collected befo...

The abundance of microplastics in the environment poses a constant threat to all parts ecosystem, and scientific community is called upon help solve problem. Numerous studies have been published for microplastic analysis, especially last decade, with vibrational spectroscopy being preferred method. According recent literature, portable spectrometers operating near-infrared (NIR) range are used ...

In the present study we have developed a new version (ND-NIRs) of a polychromator-type near-infrared (NIR) spectrometer with a high-resolution photo diode array detector, which we built before (D-NIRs). The new version has four 5 W halogen lamps compared with the three lamps for the older version. The new version also has a condenser lens with a shorter focal point length. The increase in the n...

The feasibility of a portable NIR sensor for off-line determination diverse wood quality aspects relevant in the production glue-laminated timber was demonstrated. best performance noticed assessing moisture content, with lower capacity to estimate density and mechanical properties. spectroscopy modestly capable predicting surface roughness. However, traceability raw resources automatic classif...