Near Infrared Spectroscopy as a Tool for Quality Control of Food of the Alpine Region—A Short Report about a Cross-Border Project

Benedictis, Lorenzo De; Schmutzler, Matthias; Karer, Regina; Eisenstecken, Daniela; Huck-Pezzei, V. A.; Robatscher, Peter; Oberhuber, Michael; Mimmo, Tanja; Capici, Calogero; Scampicchio, Matteo; Cesco, Stefano; Kerschbaumer, Luis; Kaser, Annemarie; Buchberger, P.; Huck, Christian

doi:10.1255/nirn.1339

Cited by 14 publications

(4 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the high activity of water in the NIR region, measuring techniques using overtone and combination bands have been applied in various fields: From investigations of changes in biological systems applying ''Aquaphotomics'' to quality control of pharmaceuticals and different foods. [27][28][29][30][31][32][33][34][35][36][37][38][39][40] Furthermore, many studies already proved the suitability of NIR spectroscopy for investigating polymers in terms of monitoring the polymerization process itself, monomeric content and water absorption or water inclusions. [41][42][43] In ATR-IR spectroscopy, the polymeric sample is pressed onto an internal reflection element (IRE) so that the evanescent field penetrates at least a few micrometers into the polymer of interest showing high signal-to-noise (S/N) ratio.…”

Section: Introductionmentioning

confidence: 99%

Novel Molecular Spectroscopic Multimethod Approach for Monitoring Water Absorption/Desorption Kinetics of CAD/CAM Poly(Methyl Methacrylate) Prosthodontics

Wiedemair¹,

Mayr²,

Wimmer³

et al. 2016

Appl Spectrosc

Self Cite

View full text Add to dashboard Cite

Water absorbed to poly(methyl methacrylate) (PMMA)-based CAD/CAM (computer-assisted design/computer-assisted manufacturing) prosthodontics can alter their properties including hardness and stability. In the present contribution, water absorption and desorption kinetics under defined experimental conditions were monitored employing several supplementary and advanced Fourier transform infrared (FT-IR) spectroscopic techniques in combination with multivariate analysis (MVA). In this synergistic vibrational spectroscopic multimethod approach, first a novel near-infrared (NIR) diffuse fiber optic probe reflection spectroscopic method was established for time-resolved analysis of water uptake within seven days under controlled conditions. Near-infrared water absorbance spectra in a wavenumber range between 5288-5100 cm (combination band) and 5424-5352 cm (second overtone) were used establishing corresponding calibration and validation models to quantify the amount of water in the milligram range. Therefore, 14 well-defined samples exposed to prior optimized experimental conditions were taken into consideration. The average daily water uptake conducting reference analysis was calculated as 22 mg/day for one week. Additionally, in this study for the first time NIR two-dimensional correlation spectroscopy (2D-COS) was conducted to monitor and interpret the spectral dynamics of water absorption on the prosthodontics in a wavenumber range of 5100-5300 cm. For sensitive time-resolved recording of water desorption, a recently developed high-temperature, high-pressure FT-IR reaction cell with water-free ultra-dry in situ and operando operation was applied. The reaction cell, as well as the sample holder, was fully made of quartz glass, with no hot metal or ceramic parts in the vicinity of the high temperature zone. Applying a temperature gradient in the range of 25-150 ℃, mid-infrared (MIR) 2D-COS was successfully conducted to get insights into the dynamic behavior of O-H (1400-1800 cm) absorption bands with increasing temperature over time and the release of CO (2450 cm) from the polymers. In addition, an ATR FT-IR imaging setup was optimized in order to investigate the surface homogeneity of the PMMA-based resins with a spatial resolution to 2 µm. From this vibrational spectroscopic multimethod approach and the collection of several analytical data, conclusions were drawn as to which degree the surface structure and/or its porosity have an impact onto the amount of water absorption.

show abstract

Section: Introductionmentioning

confidence: 99%

Novel Molecular Spectroscopic Multimethod Approach for Monitoring Water Absorption/Desorption Kinetics of CAD/CAM Poly(Methyl Methacrylate) Prosthodontics

Wiedemair¹,

Mayr²,

Wimmer³

et al. 2016

Appl Spectrosc

Self Cite

View full text Add to dashboard Cite

show abstract

“…These are possible causes of the anomalies in the spectra, which are not directly interpretable and, therefore, as already mentioned samples collected over October 2012 were not considered in the following evaluation. These abnormalities have not only been observed during NIR measurements but also by isotope ratio mass spectrometry (IRMS) and gas chromatography coupled with flame ionization detection (Scampicchio et al, 2015) during the EU-project OriginAlp, an Euregio Interreg IV initiative (De Benedictis et al, 2012). After removing the October spectra data, pretreatment was applied in the wavenumber range between 5500 and 9000 cm −1 and a PCA was calculated.…”

Section: Optimization Of Nir Spectra Employing Design Of Experiments and Determination Of Milk Compounds As Influence Factors For Changinmentioning

confidence: 99%

Detection of Irradiated Food and Evaluation of the Given Dose by Electron Spin Resonance, Thermoluminescence, and Gas Chromatographic/Mass Spectrometric Analysis

D'Oca

Bartolotta

2018

Food Control and Biosecurity

View full text Add to dashboard Cite

“…When miniaturizing an analytical instrument one of the key objectives is to ensure that the reduction in size does not compromise measurement performance and precision. It therefore follows that handheld vibrational spectrometers will only have a real impact on quality and process control if the spectra obtained from them are comparable to those produced by larger bench-top instruments [57,59].…”

Section: Principles Of Infrared Spectroscopic Analysis Techniquesmentioning

confidence: 99%

Recent Developments in Solid-Phase Extraction for Near and Attenuated Total Reflection Infrared Spectroscopic Analysis

Huck

2016

Molecules

View full text Add to dashboard Cite

A review with more than 100 references on the principles and recent developments in the solid-phase extraction (SPE) prior and for in situ near and attenuated total reflection (ATR) infrared spectroscopic analysis is presented. New materials, chromatographic modalities, experimental setups and configurations are described. Their advantages for fast sample preparation for distinct classes of compounds containing different functional groups in order to enhance selectivity and sensitivity are discussed and compared. This is the first review highlighting both the fundamentals of SPE, near and ATR spectroscopy with a view to real sample applicability and routine analysis. Most of real sample analyses examples are found in environmental research, followed by food-and bioanalysis. In this contribution a comprehensive overview of the most potent SPE-NIR and SPE-ATR approaches is summarized and provided.

show abstract

Near Infrared Spectroscopy as a Tool for Quality Control of Food of the Alpine Region—A Short Report about a Cross-Border Project

Cited by 14 publications

References 15 publications

Novel Molecular Spectroscopic Multimethod Approach for Monitoring Water Absorption/Desorption Kinetics of CAD/CAM Poly(Methyl Methacrylate) Prosthodontics

Novel Molecular Spectroscopic Multimethod Approach for Monitoring Water Absorption/Desorption Kinetics of CAD/CAM Poly(Methyl Methacrylate) Prosthodontics

Detection of Irradiated Food and Evaluation of the Given Dose by Electron Spin Resonance, Thermoluminescence, and Gas Chromatographic/Mass Spectrometric Analysis

Recent Developments in Solid-Phase Extraction for Near and Attenuated Total Reflection Infrared Spectroscopic Analysis

Contact Info

Product

Resources

About