CP/MAS 13C-NMR spectra were recorded in a Varian MR-400 spectrometer. FT-IR spectra were acquired in a PerkinElmer (USA) ATR-FTIR Spectrum 400. Size exclusion chromatography (SEC) measurements were conducted in an Agilent 1210 series (USA) liquid chromatograph equipped with a RID detector. Narrow molecular weight polyethylene glycol in deionized water (Millipore, Milli-Q) and polystyrene in THF (HPLC grade Merck) standards were used for calibration of PGAL and PCLe, respectively. The chromatographer was equipped with an Ultrahydrogel-500 (7.8 × 300 mm, Waters, USA) column for PGAL and two columns PLGEL 10 cm MIXED-B (300 × 7.5 mm, Varian, USA) in series for PCLe. Samples were dissolved in the mobile phase (1 mg mL−1) and filtered (0.45 μm) before injection in the chromatographer. Electron Spin Resonance (ESR) analyses were conducted in a Bruker ESR Elexsys E500 in quartz tubes at room temperature in the 80–4080 G interval and 9.8 × 109 Hz microwave frequency.
Atr ftir spectrum 400
Manufactured by PerkinElmer
Sourced in United States
The ATR-FTIR Spectrum 400 is a Fourier Transform Infrared (FTIR) spectrometer that utilizes Attenuated Total Reflectance (ATR) technology. It is designed to analyze the chemical composition and molecular structure of solid, liquid, and gaseous samples.
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4 protocols using atr ftir spectrum 400
1
Characterization of Polymer Materials
2
Spectroscopic Analysis of Rubber Samples
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Test strain biofilm and mycelia were removed from the rubber samples. This was done by rinsing the rubber materials with distilled water and then immersing them in 96% ethanol for 1 h before air-drying them at ambient temperature. Attenuated total reflection-Fourier transform infrared (ATR-FTIR) is used to determine the formation of new, or disappearance of, functional groups in the polymer units of the samples by observing the presence, increase, and decrease in C=C, C–C, and C–H bonds (Basik et al., 2021a ). Rubber samples (e.g., 5 mg of fresh latex pieces, 1 mg of latex glove strips, and 2 mg of tire granules) inoculated and non-inoculated were analyzed using ATR-FTIR Spectrum 400 (Perkin Elmer), equipped with ATR ranging from 4,000 to 650/cm (4/cm resolution).
3
Comprehensive Catalyst Characterization
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Shimadzu X-ray Fluorescence Spectrophotometer μ-EDX 1400 was used to analyse the metal loading in the catalyst. TriStar II 3020 Micromeritics nitrogen thermal adsorption instrument was used to calculate the total surface area, pore volume and sizes from the Brunauner-Emmet-Teller (BET) method. The average particle size and particle distribution were estimated using the Image J software analysis of the micrographs from a high-resolution transmission electron microscopy (HRTEM, JEOL JEM 2100-F), operated at 200 kV using formvar carbon film on a 400-mesh copper grid. The lattice parameters and degree of crystallinity were determined using X-ray diffraction (XRD, PANalytical model EMPYREAN) at ambient temperature with 2-theta scan range from 20° to 90°, with a Cu Kα radiation at 40 kV and 25 mA. The solvent remnants were analysed using Perkin–Elmer Spectrum 400 ATR–FTIR (attenuated total reflectance-Fourier transform infrared).
4
Electrospun Dressings Characterization
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Polymer electrospinning solutions were evaluated for conductivity using a Malvern Zetasizer Nano (Malvern Panalytical, Roystone, UK), following manufacturer protocols. Electrospun dressings were analyzed for average pore size and fiber diameter using field emission scanning electron microscopy (SEM) (Zeiss Sigma VP-40, Carl Zeiss AG, Jena, Germany) following spatter-coating with gold palladium, and porosity using helium pycnometry. Three dressings were analyzed per dressing composition, with 30 fibers and 30 pores evaluated for each, using ImageJ (NIH, Bethesda, MD, USA). Additionally, dressings were analyzed using Fourier Transform Infrared Spectroscopy (FTIR, Spectrum 400 ATR-FTIR PerkinElmer, Waltham, MA, USA) at a range of 4000–500 cm−1 to confirm the presence of Ce(III) [14 (link)].
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