Emerging applications of nano-optical sensors combined with near-infrared spectroscopy for detecting tea extract fermentation aroma under ultrasound-assisted sonication

Transfer of near infrared calibration for gasoline octane number based on screening consistent wavelengths combined with direct standardization algorithm

“…In the process of acquiring spectra of gasoline samples, any slight inconsistency of sampling cuvette thickness and its placement position might minor, but significant changes in the optical path. Therefore, standard normal variate transformation (SNV) 23,24 was employed to preprocess the spectral data to correct errors caused by optical path differences.…”

Advances in the fabrication of potential nanomaterials for diagnosis and effective treatment of tuberculosis

“…Currently, nanomaterials are being incorporated into chemical sensors to elevate their sensitivity, improve their selectivity, and lower their detection limits. For example, nanomaterials have been extensively used for constructing electrochemical sensors for detecting pesticides, 54,55 dyes, 56,57 and biological molecules 58 as well as optical sensors to detect analytes, such as glucose, 59 polyphenols, 60 pesticides, 61 metal ions, 62 crude oil, 63 and microorganisms. 64,65 Nanomaterials have been widely utilized in the fields of biomedicine and bioengineering.…”

Recent Progress on Green New Phase Extraction and Preparation of Polyphenols in Edible Oil

“…The main applications of COF adsorbents in the analysis of food contaminants include the extraction of complex samples and the extraction of organic contaminants and heavy metal ions from food contaminants. Kang et al [57] combined nano-optical sensors with near-infrared spectroscopy for the rapid detection and quantification of polyphenolic compounds and investigated the potential of chemoselective colorant-based nano-optical sensors for detecting the dynamic changes in aroma constituents during the fermentation of extracts, which demonstrated an improvement in the efficiency of polyphenolic compound detection at an ultrasound frequency of 28 kHz, a processing time of 24 min, and an ultrasound power density of 40 W/L. In magnetic porous organic frameworks (MPOFs) materials, due to the presence of pores, the physical and chemical properties of porous materials have been greatly enhanced, with the remarkable features of diverse synthesis methods, high physicochemical stability, strong magnetic responsiveness, easy separation, and excellent application performance in the extraction and enrichment of the target analytes for organic compounds (veterinary drugs, pesticides, endocrine disrupters, and other organic pollutants), heavy-metal ions and biomolecules, etc., which have a wide range of applications [58].…”