Fourier transform infrared spectrometer

FTIR experiments were carried out using JASCO Fourier Transform Infrared Spectrometer (Japan, model no. AUP1200343) to detect the surface molecular structures in the range of 400–4000 cm⁻¹. Few dried samples of starch, BSA, MOLE and Encap. MOLE were grounded with KBr into homogenous powder and pressed into a suitable tablet with good thickness. For all the tests, at least three scans were recorded for different regions on the samples and the representative spectra were analyzed [28 (link)].

We measured the infrared absorption spectra of repagermanium via the KBr method using Fourier Transform Infrared Spectrometer (Jasco Corporation, Tokyo, Japan) to investigate the structural differences between repagermanium manufactured by Asai and commercial repagermanium. A tablet was formed by adding 2 mg of pulverized crystals and 0.2 g of KBr to a press. Measurements were performed according to the manufacturer’s instructions, and the measuring wavenumber range was set to 4600–400 cm⁻¹. Furthermore, we used a 300-MHz Varian Gemini 2000 spectrometer (Agilent Technologies, Santa Clara, CA, USA) to analyze differences in the molecular structure of the material. THGP was prepared with D₂O at a concentration of 20 mM. Measurements were acquired at 30 °C, and 16 to 64 transients were used for the ¹H analyses. Chemical shifts were expressed in ppm relative to the H resonance of HOD in the solvent, which was offset by 4.80 ppm.