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Fomina P, Femenias A, Hlavatsch M, Scheuermann J, Schäfer N, Freitag S, Patel N, Kohler A, Krska R, Koeth J, Mizaikoff B. A Portable Infrared Attenuated Total Reflection Spectrometer for Food Analysis. Appl Spectrosc 2023; 77:1073-1086. [PMID: 37525897 PMCID: PMC10478342 DOI: 10.1177/00037028231190660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 06/11/2023] [Indexed: 08/02/2023]
Abstract
The analytical performance of a compact infrared attenuated total reflection spectrometer using a pyroelectric detector array has been evaluated and compared to a conventional laboratory Fourier transform infrared system for applications in food analysis. Analytical characteristics including sensitivity, repeatability, linearity of the calibration functions, signal-to-noise ratio, and spectral resolution have been derived for both approaches. Representative analytes of relevance in food industries (i.e., organic solvents, fatty acids, and mycotoxins) have been used for the assessment of the performance of the device and to discuss the potential of this technology in food and feed analysis.
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Affiliation(s)
- Polina Fomina
- Institute of Analytical and Bioanalytical Chemistry, Ulm University, Ulm, Germany
| | - Antoni Femenias
- Institute of Analytical and Bioanalytical Chemistry, Ulm University, Ulm, Germany
| | - Michael Hlavatsch
- Institute of Analytical and Bioanalytical Chemistry, Ulm University, Ulm, Germany
| | | | - Nicolas Schäfer
- Nanoplus Nanosystems and Technologies GmbH, Gerbrunn, Germany
| | - Stephan Freitag
- Department of Agrobiotechnology IFA-Tulln, Institute of Bioanalytics and Agro-Metabolomics, University of Natural Resources and Life Sciences Vienna, Tulln, Austria
| | - Nageshvar Patel
- Faculty of Science and Technology, Norwegian University of Life Sciences, Ås, Norway
| | - Achim Kohler
- Faculty of Science and Technology, Norwegian University of Life Sciences, Ås, Norway
| | - Rudolf Krska
- Department of Agrobiotechnology IFA-Tulln, Institute of Bioanalytics and Agro-Metabolomics, University of Natural Resources and Life Sciences Vienna, Tulln, Austria
- School of Biological Science, Institute for Global Food Security, Queen's University Belfast, Belfast, Northern Ireland
| | - Johannes Koeth
- Nanoplus Nanosystems and Technologies GmbH, Gerbrunn, Germany
| | - Boris Mizaikoff
- Institute of Analytical and Bioanalytical Chemistry, Ulm University, Ulm, Germany
- Hahn-Schickard, Ulm, Germany
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Hashimoto K, Morisawa Y, Tortora M, Rossi B, Ozaki Y, Sato H. Attenuated Total Reflection Far-Ultraviolet (ATR-FUV) Spectroscopy is a Sensitive Tool for Investigation of Protein Adsorption. Appl Spectrosc 2022; 76:793-800. [PMID: 35081773 DOI: 10.1177/00037028211070835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Attenuated total reflection far-ultraviolet (ATR-FUV) spectra in the 145-250 nm region were studied for four kinds of proteins (two α-helix-rich proteins: bovine serum albumin (BSA) and lysozyme and two β-sheet rich proteins: concanavalin A and γ-globulin) in different solutions (pure water and phosphate buffered saline, or PBS) with different concentrations. All the spectra show a band at 191 nm due to the π-π* transition of amide bonds of the proteins. The wavelength of the band does not change with their second structures, suggesting that the corresponding electronic transition mode is localized and polarized in the direction that is not affected by the difference in the peptide folding. The intensity of the 191 nm band differs with the concentration of salt in the solution, suggesting that the band intensity reflects the adsorption density of a protein on the internal reflection element (IRE) made of a sapphire glass prism. According to the intensity changes of the band at 191 nm, it is revealed that the properties in adsorption are different from one protein to another. It is assumed that there are two types of forces on the protein adsorption: one is that among the molecules and the other is that between a molecule and a substrate. The origin of force includes localized electrostatic polarity and affinity to water. The ions in the solvent give a marked effect on these forces, resulting in the difference in the response to adsorption density against the salt concentration in the solvent.
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Affiliation(s)
- Kosuke Hashimoto
- School of Biological and Environmental Sciences, 98311Kwansei Gakuin University, Hyogo, Japan
| | - Yusuke Morisawa
- School of Science and Engineering, Kindai University, Osaka, Japan
| | - Mariagrazia Tortora
- Area Science Park, Trieste, Italy
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | | | - Yukihiro Ozaki
- School of Biological and Environmental Sciences, 98311Kwansei Gakuin University, Hyogo, Japan
- Toyota Physical and Chemical Research Institute, Aichi, Japan
| | - Hidetoshi Sato
- School of Biological and Environmental Sciences, 98311Kwansei Gakuin University, Hyogo, Japan
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Teuber A, Stach R, Haas J, Mizaikoff B. Innovative Substrate-Integrated Hollow Waveguide Coupled Attenuated Total Reflection Sensors for Quantum Cascade Laser Based Infrared Spectroscopy in Harsh Environments. Appl Spectrosc 2022; 76:132-140. [PMID: 34890273 DOI: 10.1177/00037028211064331] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
An innovative mid-infrared spectroscopic sensor system based on quantum cascade lasers has been developed. The system combines the versatility of substrate-integrated hollow waveguides (IHWGs) with the robustness of attenuated total reflection (ATR) crystals employed as internal reflection waveguides for evanescent field sensing. IHWGs are highly reflective metal structures that propagate infrared (IR) radiation and were used as light pipes for coupling radiation into the ATR waveguide. The combined IHWG-ATR device has been designed such that the utmost stability and robustness of the optical alignment were ensured. This novel assembly enables evanescent field absorption measurements at yet unprecedently harsh conditions, that is, high pressure and temperature. Combining these advantages, this innovative sensor assembly is perfectly suited for taking ATR spectroscopy into the field where the robustness of the assembly and optical alignment is essential.
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Affiliation(s)
- Andrea Teuber
- Institute of Analytical and Bioanalytical Chemistry, 9189Ulm University, Ulm, Germany
| | | | | | - Boris Mizaikoff
- Institute of Analytical and Bioanalytical Chemistry, 9189Ulm University, Ulm, Germany
- 199772Hahn-Schickard, Ulm, Germany
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Hu M, Tang M, Wang H, Zhang M, Zhu S, Yang Z, Zhou S, Zhang H, Hu J, Guo Y, Wei X, Liao Y. Terahertz, infrared and Raman absorption spectra of tyrosine enantiomers and racemic compound. Spectrochim Acta A Mol Biomol Spectrosc 2021; 254:119611. [PMID: 33689998 DOI: 10.1016/j.saa.2021.119611] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 02/04/2021] [Accepted: 02/07/2021] [Indexed: 05/26/2023]
Abstract
The application of terahertz (THz)-based techniques in biomolecule study is very promising but still in its infancy. In the present work, we employed THz time-domain spectroscopy (THz-TDS) and THz time-domain attenuated total reflection (THz-TD-ATR) spectroscopy to investigate the properties of tyrosine (Tyr) enantiomers (L- and D-Tyr) and racemate (DL-Tyr) in solid state and aqueous solutions, respectively. THz absorption spectra of solid L- and D-Tyr show similar absorption spectra with peaks at 0.95, 1.92, 2.06 and 2.60 THz, which are obviously different from the spectrum of DL-Tyr with peaks at 1.5, 2.15 and 2.40 THz. In contrast, although THz absorption spectra of L-Tyr solution and D-Tyr solution are similar and different from the spectrum of DL-Tyr solution, both of them have no observable peaks. Interestingly, it was found that the solution containing equal amounts of L- and D-Tyr has a similar spectrum as that of DL-Tyr solution, as far as the mass concentrations of the two types of solutions are kept the same. On other hand, solid L-, D- and DL-Tyr were also investigated with infrared spectroscopy and Raman spectroscopy, respectively. The results show that the spectra of L- and D-Tyr can be regarded the same but they are slightly different from the spectrum of DL-Tyr. With the aid of principal component analysis (PCA), the difference between L-/D-Tyr and DL-Tyr can be confirmed without any ambiguity. Overall, this work systematically interrogated and evaluated the performance of THz-based techniques in the detection of the chirality of tyrosine.
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Affiliation(s)
- Meidie Hu
- College of Engineering and Technology, Southwest University, Chongqing 400716, China; Research Center of Applied Physics, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
| | - Mingjie Tang
- Research Center of Applied Physics, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, China; Chongqing Engineering Research Center of High-Resolution and Three-Dimensional Dynamic Imaging Technology, Chongqing 400714, China
| | - Huabin Wang
- Research Center of Applied Physics, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, China; Chongqing Engineering Research Center of High-Resolution and Three-Dimensional Dynamic Imaging Technology, Chongqing 400714, China.
| | - Mingkun Zhang
- Research Center of Applied Physics, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, China; Chongqing Engineering Research Center of High-Resolution and Three-Dimensional Dynamic Imaging Technology, Chongqing 400714, China
| | - Shiping Zhu
- College of Engineering and Technology, Southwest University, Chongqing 400716, China.
| | - Zhongbo Yang
- Research Center of Applied Physics, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, China; Chongqing Engineering Research Center of High-Resolution and Three-Dimensional Dynamic Imaging Technology, Chongqing 400714, China
| | - Shengling Zhou
- College of Engineering and Technology, Southwest University, Chongqing 400716, China
| | - Hua Zhang
- Research Center of Applied Physics, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, China; Chongqing Engineering Research Center of High-Resolution and Three-Dimensional Dynamic Imaging Technology, Chongqing 400714, China
| | - Jiao Hu
- Research Center of Applied Physics, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
| | - Yuansen Guo
- Research Center of Applied Physics, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
| | - Xiao Wei
- College of Engineering and Technology, Southwest University, Chongqing 400716, China
| | - Yunsheng Liao
- Research Center of Applied Physics, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
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Sperling BA, Kalanyan B. Evaluation of Silicon Wafer-Based Internal Reflection Elements for Use with in Situ Fourier Transform Infrared (FT-IR) Spectroscopy. Appl Spectrosc 2018; 72:1396-1403. [PMID: 29756992 PMCID: PMC6349246 DOI: 10.1177/0003702818779799] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Silicon wafer-based internal reflection elements (IREs) present many practical advantages over the prisms conventionally used for attenuated total reflection (ATR) spectroscopy in the infrared. We examine two methods of using minimally prepared IREs that have appeared in the literature, edge-coupled (EC) and prism-coupled (PC), in conjunction with a liquid flow cell. Polarization measurements show that radiation entering the PC-IRE becomes depolarized due to stress-induced birefringence, and transmission through the edge of the EC-IRE also affects the polarization state. Quantification of the noise and a calibration using a series of sodium acetate solutions show the sensitivity of the PC-IRE outweighs the lower noise obtainable with the EC-IRE.
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Perera UDN, Nishikida K, Lavine BK. Development of Infrared Library Search Prefilters for Automotive Clear Coats from Simulated Attenuated Total Reflection (ATR) Spectra. Appl Spectrosc 2018; 72:886-895. [PMID: 29424551 DOI: 10.1177/0003702818759664] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A previously published study featuring an attenuated total reflection (ATR) simulation algorithm that mitigated distortions in ATR spectra was further investigated to evaluate its efficacy to enhance searching of infrared (IR) transmission libraries. In the present study, search prefilters were developed from transformed ATR spectra to identify the assembly plant of a vehicle from ATR spectra of the clear coat layer. A total of 456 IR transmission spectra from the Paint Data Query (PDQ) database that spanned 22 General Motors assembly plants and served as a training set cohort were transformed into ATR spectra by the simulation algorithm. These search prefilters were formulated using the fingerprint region (1500 cm-1 to 500 cm-1). Both the transformed ATR spectra (training set) and the experimental ATR spectra (validation set) were preprocessed for pattern recognition analysis using the discrete wavelet transform, which increased the signal-to-noise of the ATR spectra by concentrating the signal in specific wavelet coefficients. Attenuated total reflection spectra of 14 clear coat samples (validation set) measured with a Nicolet iS50 Fourier transform IR spectrometer were correctly classified as to assembly plant(s) of the automotive vehicle from which the paint sample originated using search prefilters developed from 456 simulated ATR spectra. The ATR simulation (transformation) algorithm successfully facilitated spectral library matching of ATR spectra against IR transmission spectra of automotive clear coats in the PDQ database.
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Affiliation(s)
| | - Koichi Nishikida
- 2 Materials Science Center, College of Engineering, University of Wisconsin, Madison, WI, USA
| | - Barry K Lavine
- 1 Department of Chemistry, Oklahoma State University, Stillwater, OK, USA
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Mayerhöfer TG, Popp J. Electric field standing wave effects in internal reflection and ATR spectroscopy. Spectrochim Acta A Mol Biomol Spectrosc 2018; 191:165-171. [PMID: 29031123 DOI: 10.1016/j.saa.2017.10.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 09/25/2017] [Accepted: 10/02/2017] [Indexed: 06/07/2023]
Abstract
We investigate electric field standing wave effects in the system semiinfinite incidence medium with high index of refraction/layer/vacuum, the latter being the semiinfinite exit medium. If the layer has a lower index of refraction than the incidence medium, then very strong resonances occur between the two critical angles of the system defined by the systems incidence medium/layer and incidence medium/vacuum, as the layer is then a cavity. In particular close to the lower critical angles, the evanescent fields extend strongly into the exit medium. Based on this effect we suggest two new spectroscopic modalities, namely interference-enhanced internal reflection Raman spectroscopy and interference-enhanced attenuated total reflection infrared spectroscopy.
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Affiliation(s)
- Thomas G Mayerhöfer
- Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Str. 9, D-07745 Jena, Germany; Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University, Helmholtzweg 4, D-07743 Jena, Germany.
| | - Jürgen Popp
- Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Str. 9, D-07745 Jena, Germany; Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University, Helmholtzweg 4, D-07743 Jena, Germany
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Boonen HAL, Koskamp JA, Theiss W, Iedema PD, Willemse RXE. Simultaneous Real-Time Analysis of Bulk and Bottom Cure of Ultraviolet-Curable Inks Using Fourier Transform Infrared Spectroscopy. Appl Spectrosc 2017; 71:2699-2706. [PMID: 28741404 DOI: 10.1177/0003702817718203] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The curing characteristics of an ultraviolet (UV) ink layer are of utmost importance for the development of UV inks. Measuring either bulk or bottom cure in itself is not new and has been the subject of many articles. In this article, two methods are described based on Fourier transform infrared (FT-IR) spectrometry to measure in real time and simultaneously the bulk and bottom cure of a thin UV ink layer. The procedure consists of applying a thin (10-12 µm) layer of UV-curing ink on an attenuated total reflection (ATR) crystal. The bottom cure is measured with ATR. The bulk cure is measured simultaneously with a reflection analysis (method 1) or a transmission analysis (method 2). With both methods, the bulk and bottom cure can be determined. To overcome problems with the interference in the ATR reflection setup, it is recommended to use the ATR transmission setup.
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Affiliation(s)
| | | | | | - Piet D Iedema
- 2 University of Amsterdam, Amsterdam, The Netherlands
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Korsunska N, Baran M, Vorona I, Nosenko V, Lavoryk S, Portier X, Khomenkova L. Impurity-Governed Modification of Optical and Structural Properties of ZrO 2-Based Composites Doped with Cu and Y. Nanoscale Res Lett 2017; 12:157. [PMID: 28249369 PMCID: PMC5328883 DOI: 10.1186/s11671-017-1920-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 02/14/2017] [Indexed: 06/06/2023]
Abstract
The influence of calcination temperature on copper spatial localization in Y-stabilized ZrO2 powders was studied by attenuated total reflection, diffuse reflectance, electron paramagnetic resonance, transmission electron microscopy, electron energy loss, and energy-dispersive X-ray spectroscopies. It was found that calcination temperature rise in the range of 500-700 °C caused the increase of copper concentration in the volume of ZrO2 nanocrystals. This increase was due to Cu in-diffusion from surface complexes that contained copper ions linked with either water molecules or OH groups. This copper in-diffusion led also to an enhancement of absorption band peaked at ~270 nm that was ascribed to the formation of additional oxygen vacancies in nanocrystal volume. Further increasing of calcination temperature from 800 up to 1000 °C resulted in outward Cu diffusion accompanied by a decrease of the intensity of the 270-nm absorption band (i.e., oxygen vacancies' number), the transformation of ZrO2 tetragonal (cubic) phase to monoclinic one as well as the enhancement of absorption band of dispersed and crystalline CuO in the 600-900 nm range.
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Affiliation(s)
- N. Korsunska
- V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine, 45 Pr. Nauky, Kyiv, 03028 Ukraine
| | - M. Baran
- V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine, 45 Pr. Nauky, Kyiv, 03028 Ukraine
| | - I. Vorona
- V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine, 45 Pr. Nauky, Kyiv, 03028 Ukraine
| | - V. Nosenko
- V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine, 45 Pr. Nauky, Kyiv, 03028 Ukraine
| | - S. Lavoryk
- V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine, 45 Pr. Nauky, Kyiv, 03028 Ukraine
- NanoMedTech LLC, 68 Antonovycha Str, Kyiv, 03680 Ukraine
| | - X. Portier
- CIMAP Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, 6 Boulevard Marechal Juin, Caen, 14050 France
| | - L. Khomenkova
- V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine, 45 Pr. Nauky, Kyiv, 03028 Ukraine
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Li Q, Tang Y, Yan Z, Zhang P. Identification of trace additives in polymer materials by attenuated total reflection Fourier transform infrared mapping coupled with multivariate curve resolution. Spectrochim Acta A Mol Biomol Spectrosc 2017; 180:154-160. [PMID: 28284161 DOI: 10.1016/j.saa.2017.03.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Revised: 02/13/2017] [Accepted: 03/05/2017] [Indexed: 06/06/2023]
Abstract
Although multivariate curve resolution (MCR) has been applied to the analysis of Fourier transform infrared (FTIR) imaging, it is still problematic to determine the number of components. The reported methods at present tend to cause the components of low concentration missed. In this paper a new idea was proposed to resolve this problem. First, MCR calculation was repeated by increasing the number of components sequentially, then each retrieved pure spectrum of as-resulted MCR component was directly compared with a real-world pixel spectrum of the local high concentration in the corresponding MCR map. One component was affirmed only if the characteristic bands of the MCR component had been included in its pixel spectrum. This idea was applied to attenuated total reflection (ATR)/FTIR mapping for identifying the trace additives in blind polymer materials and satisfactory results were acquired. The successful demonstration of this novel approach opens up new possibilities for analyzing additives in polymer materials.
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Affiliation(s)
- Qian Li
- State Key Laboratory of Chemical Resource Engineering, Analysis and Test Center, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yongjiao Tang
- State Key Laboratory of Chemical Resource Engineering, Analysis and Test Center, Beijing University of Chemical Technology, Beijing 100029, China
| | - Zhiwei Yan
- State Key Laboratory of Chemical Resource Engineering, Analysis and Test Center, Beijing University of Chemical Technology, Beijing 100029, China
| | - Pudun Zhang
- State Key Laboratory of Chemical Resource Engineering, Analysis and Test Center, Beijing University of Chemical Technology, Beijing 100029, China.
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Chen J, Sun S, Zhou Q. Direct and model-free detection of carbohydrate excipients in traditional Chinese medicine formula granules by ATR-FTIR microspectroscopic imaging. Anal Bioanal Chem 2017; 409:2893-904. [PMID: 28188353 DOI: 10.1007/s00216-017-0234-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 01/16/2017] [Accepted: 01/27/2017] [Indexed: 10/20/2022]
Abstract
A formula granule is a traditional Chinese medicine preparation made from the decoction of a single herbal medicinal. Because of the flexibility for combination and the convenience for utilization, formula granules are becoming popular in clinical applications. However, the efficacy and safety of commercial formula granules often suffer from the improper addition of carbohydrate excipients. Therefore, the detection of carbohydrate excipients is indispensable for the quality control of formula granules. FTIR spectroscopy has been used for the detection of carbohydrate excipients in formula granules. But the overlapped absorption signals limit the sensitivity and specificity of detection. Besides, a large number of multivariate calibration models are needed for quantitative determination. To overcome the above disadvantages, this research utilizes FTIR microspectroscopy for the model-free and universal detection of carbohydrate excipients in formula granules. Using ATR-FTIR imaging, excipient particles and herbal extract particles in formula granules can be measured individually, which resolves the absorption signals of excipients and herbal extract spatially and thus improves the sensitivity and specificity of detection. The content of excipients can be estimated directly from the number of excipient particles, which is robust to the variations of herb extracts and free of calibration models. The case study of Gardeniae Fructus formula granules shows the potential of FTIR microspectroscopy in the direct and rapid detection of carbohydrate excipients in formula granules. Graphical Abstract Excipient particles in TCM formula granules can be measured and recognized individually by FTIR microspectroscopy.
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Banas A, Banas K, Kalaiselvi SMP, Pawlicki B, Kwiatek WM, Breese MBH. Is it possible to find presence of lactose in pharmaceuticals? - Preliminary studies by ATR-FTIR spectroscopy and chemometrics. Spectrochim Acta A Mol Biomol Spectrosc 2017; 171:280-286. [PMID: 27541800 DOI: 10.1016/j.saa.2016.08.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 07/31/2016] [Accepted: 08/03/2016] [Indexed: 06/06/2023]
Abstract
Lactose and saccharose have the same molecular formula; however, the arrangement of their atoms is different. A major difference between lactose and saccharose with regard to digestion and processing is that it is not uncommon for individuals to be lactose intolerant (around two thirds of the population has a limited ability to digest lactose after infancy), but it is rather unlikely to be saccharose intolerant. The pharmaceutical industry uses lactose and saccharose as inactive ingredients of drugs to help form tablets because of their excellent compressibility properties. Some patients with severe lactose intolerance may experience symptoms of many allergic reactions after taking medicine that contains this substance. People who are specifically "allergic" to lactose (not just lactose intolerant) should not use tablets containing this ingredient. Fourier Transform Infrared (FTIR) spectroscopy has a unique chemical fingerprinting capability and plays a significant important role in the identification and characterization of analyzed samples and hence has been widely used in pharmaceutical science. However, a typical FTIR spectrum collected from tablets contains a myriad of valuable information hidden in a family of tiny peaks. Powerful multivariate spectral data processing can transform FTIR spectroscopy into an ideal tool for high volume, rapid screening and characterization of even minor tablet components. In this paper a method for distinction between FTIR spectra collected for tablets with or without lactose is presented. The results seem to indicate that the success of identifying one component in FTIR spectra collected for pharmaceutical composition (that is tablet) is largely dependent on the choice of the chemometric technique applied.
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Affiliation(s)
- A Banas
- Singapore Synchrotron Light Source, 5 Research Link, 117603 Singapore, Singapore.
| | - K Banas
- Singapore Synchrotron Light Source, 5 Research Link, 117603 Singapore, Singapore
| | - S M P Kalaiselvi
- Singapore Synchrotron Light Source, 5 Research Link, 117603 Singapore, Singapore
| | - B Pawlicki
- Gabriel Narutowicz Hospital, Pradnicka 37, 31-202 Krakow, Poland
| | - W M Kwiatek
- Institute of Nuclear Physics PAN, Radzikowskiego 152, 31-342 Krakow, Poland
| | - M B H Breese
- Singapore Synchrotron Light Source, 5 Research Link, 117603 Singapore, Singapore
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Chen JB, Sun SQ, Zhou Q. Chemical morphology of Areca nut characterized directly by Fourier transform near-infrared and mid-infrared microspectroscopic imaging in reflection modes. Food Chem 2016; 212:469-75. [PMID: 27374557 DOI: 10.1016/j.foodchem.2016.05.168] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Revised: 05/13/2016] [Accepted: 05/26/2016] [Indexed: 11/20/2022]
Abstract
Fourier transform near-infrared (NIR) and mid-infrared (MIR) imaging techniques are essential tools to characterize the chemical morphology of plant. The transmission imaging mode is mostly used to obtain easy-to-interpret spectra with high signal-to-noise ratio. However, the native chemical compositions and physical structures of plant samples may be altered when they are microtomed for the transmission tests. For the direct characterization of thick plant samples, the combination of the reflection NIR imaging and the attenuated total reflection (ATR) MIR imaging is proposed in this research. First, the reflection NIR imaging method can explore the whole sample quickly to find out typical regions in small sizes. Next, each small typical region can be measured by the ATR-MIR imaging method to reveal the molecular structures and spatial distributions of compounds of interest. As an example, the chemical morphology of Areca nut section is characterized directly by the above approach.
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Schädle T, Mizaikoff B. Selecting the Right Tool: Comparison of the Analytical Performance of Infrared Attenuated Total Reflection Accessories. Appl Spectrosc 2016; 70:1072-1079. [PMID: 27091901 DOI: 10.1177/0003702816641574] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Accepted: 10/09/2015] [Indexed: 06/05/2023]
Abstract
The analytical performance of four commercially available infrared attenuated total reflection (IR-ATR) accessories with various ATR waveguide materials has been analyzed and evaluated using acetate, CO2, and CO3 (2-) solutions. Calibration functions have been established to determine and compare analytically relevant parameters such as sensitivity, signal-to-noise ratio (SNR), and efficiency. The obtained parameters were further analyzed to support conclusions on the differences in performance of the individual IR-ATR accessories.
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Affiliation(s)
- Thomas Schädle
- Institute of Analytical and Bioanalytical Chemistry, University of Ulm, Ulm, Germany
| | - Boris Mizaikoff
- Institute of Analytical and Bioanalytical Chemistry, University of Ulm, Ulm, Germany
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Nakata S, Deguchi A, Seki Y, Furuta M, Fukuhara K, Nishihara S, Inoue K, Kumazawa N, Mashiko S, Fujihira S, Goto M, Denda M. Characteristic responses of a phospholipid molecular layer to polyols. Colloids Surf B Biointerfaces 2015; 136:594-9. [PMID: 26454550 DOI: 10.1016/j.colsurfb.2015.09.035] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Revised: 09/17/2015] [Accepted: 09/18/2015] [Indexed: 01/06/2023]
Abstract
Polyols (sugar alcohols) are widely used in foods, pharmaceutical formulations and cosmetics, and therefore it is important to understand their effects on cell membranes and skin. To address this issue, we examined the effect of polyols (1,2-ethanediol (ethylene glycol), 1,3-butanediol, 1,2,3-propanetriol (glycerol), and 1,2,3,4-butanetetraol) on artificial membrane systems (liposomes, monolayers, or dry films) prepared from phospholipid (1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC)). 1,2-Ethanediol and 1,3-butanediol had little effect on the size of the DMPC liposomes or the surface pressure (π)-surface area (A) isotherm of DMPC monolayers at an air-water interface, whereas 1,2,3-propanetriol or 1,2,3,4-butanetetraol increased both liposome size and surface pressure. Attenuated total reflection Fourier transform infrared spectroscopy (ATR FT-IR) and differential scanning calorimetry (DSC) were used to evaluate the interaction between DMPC and polyols. These experimental results suggest that the chemical structure of polyol plays an important role in the characteristic interaction between polyol and DMPC.
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Affiliation(s)
- Satoshi Nakata
- Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526, Japan; Japan Science and Technology Agency, CREST, Tokyo, Japan.
| | - Ayano Deguchi
- Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526, Japan
| | - Yota Seki
- Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526, Japan
| | - Miyuki Furuta
- Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526, Japan
| | - Koichi Fukuhara
- Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526, Japan
| | - Sadafumi Nishihara
- Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526, Japan
| | - Katsuya Inoue
- Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526, Japan
| | - Noriyuki Kumazawa
- Department of Biomolecular Functional Engineering, College of Engineering, Ibaraki University, 4-12-1 Nakanarusawa, Hitachi, Ibaraki 316-8511, Japan
| | - Shun Mashiko
- Department of Biomolecular Functional Engineering, College of Engineering, Ibaraki University, 4-12-1 Nakanarusawa, Hitachi, Ibaraki 316-8511, Japan
| | - Shota Fujihira
- Department of Biomolecular Functional Engineering, College of Engineering, Ibaraki University, 4-12-1 Nakanarusawa, Hitachi, Ibaraki 316-8511, Japan
| | - Makiko Goto
- Japan Science and Technology Agency, CREST, Tokyo, Japan; Shiseido Research Center, 2-2-1Hayabuchi, Tsuzuki-ku, Yokohama 224-8558, Japan
| | - Mitsuhiro Denda
- Japan Science and Technology Agency, CREST, Tokyo, Japan; Shiseido Research Center, 2-2-1Hayabuchi, Tsuzuki-ku, Yokohama 224-8558, Japan
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16
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Jen YJ, Liu WC, Chao JH, Huang JW, Chang YT. Strong light coupling effect for a glancing-deposited silver nanorod array in the Kretschmann configuration. Nanoscale Res Lett 2014; 9:567. [PMID: 25352769 PMCID: PMC4211103 DOI: 10.1186/1556-276x-9-567] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2014] [Accepted: 09/09/2014] [Indexed: 05/30/2023]
Abstract
In this work, three slanted silver nanorod arrays (NRAs) with different thicknesses are fabricated using the glancing angle deposition method. Each silver NRA in the Kretschmann configuration is arranged to form a prism/NRA/air system. Attenuated total reflection occurs over the visible wavelengths and wide incident angles of both s- and p-polarization states. The extinctance is inversely proportional to the thickness of the Ag NRA. The thinnest NRA, with a thickness of 169 nm, exhibits strong extinctance of more than 80% over the visible wavelengths. The associated forward scatterings from the three NRAs are measured and compared under illumination with a laser beam with a wavelength of 632.8 nm.
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Affiliation(s)
- Yi-Jun Jen
- Department of Electro-Optical Engineering, National Taipei University of Technology No. 1, Sec. 3, Chung-Hsiao E. Rd, Taipei 106, Taiwan
| | - Wei-Chih Liu
- Department of Electro-Optical Engineering, National Taipei University of Technology No. 1, Sec. 3, Chung-Hsiao E. Rd, Taipei 106, Taiwan
| | - Jung-Hui Chao
- Department of Electro-Optical Engineering, National Taipei University of Technology No. 1, Sec. 3, Chung-Hsiao E. Rd, Taipei 106, Taiwan
| | - Jyong-Wei Huang
- Department of Electro-Optical Engineering, National Taipei University of Technology No. 1, Sec. 3, Chung-Hsiao E. Rd, Taipei 106, Taiwan
| | - Yuan-Tai Chang
- Department of Electro-Optical Engineering, National Taipei University of Technology No. 1, Sec. 3, Chung-Hsiao E. Rd, Taipei 106, Taiwan
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Correa W, Manrique-Moreno M, Patiño E, Peláez-Jaramillo C, Kaconis Y, Gutsmann T, Garidel P, Heinbockel L, Brandenburg K. Galleria mellonella native and analogue peptides Gm1 and ΔGm1. I) biophysical characterization of the interaction mechanisms with bacterial model membranes. Biochim Biophys Acta 2014; 1838:2728-38. [PMID: 25017800 DOI: 10.1016/j.bbamem.2014.07.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Revised: 04/29/2014] [Accepted: 07/01/2014] [Indexed: 10/25/2022]
Abstract
Natural occurring antimicrobial peptides (AMPs) are important components of the innate immune system of animals and plants. They are considered to be promising alternatives to conventional antibiotics. Here we present a comparative study of two synthetic peptides: Gm1, corresponding to the natural overall uncharged peptide from Galleria mellonella (Gm) and ΔGm1, a modified overall positively charged Gm1 variant. We have studied the interaction of the peptides with lipid membranes composed of different kinds of lipopolysaccharides (LPS) and dimyristoylphosphatidylglycerol (DMPG), in some cases also dimyristoylphosphatidylethanolamine (DMPE) as representative lipid components of Gram-negative bacterial membranes, by applying Fourier-transform infrared spectroscopy (FTIR), Förster resonance energy transfer spectroscopy (FRET), differential scanning calorimetry (DSC) and isothermal titration calorimetry (ITC). Gm1 generates a destabilizing effect on the gel to liquid crystalline phase transition of the acyl chains of the lipids, as deduced from a decrease in the phase transition temperature and enthalpy, suggesting a fluidization, whereas ΔGm1 led to the opposite behavior. Further, FTIR analysis of the functional groups of the lipids participating in the interaction with the peptides indicated a shift in the band position and intensity of the asymmetric PO2(-) stretching vibration originating from the lipid phosphate groups, a consequence of the sterical changes in the head group region. Interestingly, FRET spectroscopy showed a similar intercalation of both peptides into the DMPG and LPS, but much less into the DMPE membrane systems. These results are discussed in the light of a possible use of the peptides as antimicrobial and anti-endotoxin drugs.
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Affiliation(s)
- Wilmar Correa
- Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, AA. 1226 Medellín, Colombia.
| | - Marcela Manrique-Moreno
- Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, AA. 1226 Medellín, Colombia.
| | - Edwin Patiño
- Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, AA. 1226 Medellín, Colombia.
| | - Carlos Peláez-Jaramillo
- Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, AA. 1226 Medellín, Colombia.
| | - Yani Kaconis
- Forschungszentrum Borstel, LG Biophysik, D-23845 Borstel, Germany.
| | - Thomas Gutsmann
- Forschungszentrum Borstel, LG Biophysik, D-23845 Borstel, Germany.
| | - Patrick Garidel
- Martin-Luther-University Halle/Wittenberg, Department of Chemistry/Physical Chemistry, D-06120 Halle/Saale, Germany.
| | - Lena Heinbockel
- Forschungszentrum Borstel, LG Biophysik, D-23845 Borstel, Germany.
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Huck CW. Advances of vibrational spectroscopic methods in phytomics and bioanalysis. J Pharm Biomed Anal 2013; 87:26-35. [PMID: 23787354 DOI: 10.1016/j.jpba.2013.05.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2013] [Revised: 05/08/2013] [Accepted: 05/10/2013] [Indexed: 11/24/2022]
Abstract
During the last couple of years great advances in vibrational spectroscopy including near-infrared (NIR), mid-infrared (MIR), attenuated total reflection (ATR) and imaging and also mapping techniques could be achieved. On the other hand spectral treatment features have improved dramatically allowing filtering out relevant information from spectral data much more efficiently and providing new insights into the biochemical composition. These advances offer new possible quality control strategies in phytomics and enable to get deeper insights into biochemical background in terms of medicinal relevant questions. It is the aim of the present article pointing out the technical and methodological advancements in the NIR and MIR field and to demonstrate the individual methods efficiency by discussing distinct selected applications.
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Affiliation(s)
- Christian W Huck
- Institute of Analytical Chemistry and Radiochemistry, CCB - Center for Chemistry and Biomedicine, Leopold-Franzens University, Innrain 80/82, 6020 Innsbruck, Austria.
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