The OPA (1 mg) were ground with KBr, and determined on an infrared spectrometer (Perkin Elmer 1600 spectrometer) from 4000 to 400 cm−1. The functional groups of the polysaccharides were preliminarily analyzed by observing the absorption peaks.
1600 spectrometer
Manufactured by PerkinElmer
Sourced in United States
The PerkinElmer 1600 spectrometer is a versatile laboratory instrument used for analyzing the composition and structure of various materials. It is designed to measure the absorption or emission of electromagnetic radiation by a sample, providing valuable insights into its chemical and physical properties. The core function of the 1600 spectrometer is to accurately detect and quantify the intensity of light at different wavelengths, enabling researchers and analysts to identify and characterize the components present in a sample.
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4 protocols using 1600 spectrometer
1
Infrared Spectroscopic Analysis of Polysaccharides
2
Characterization of Magnetic Materials
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NMR spectra were collected on a Bruker AV-300 spectrometer. Infrared spectra were obtained using KBr pellets on a PerkinElmer 1600 spectrometer in the 450–4000 cm−1 range. DC magnetic measurements were collected using a Quantum Design MPMS7 system. Samples were restrained with parafilm to prevent torqueing. The magnetic background caused by the gel cap and the parafilm were subtracted by blank measurements. The diamagnetism correction was estimated from Pascal's constant.22 Elemental analyses (C, H, N) and dc magnetic susceptibility measurements were carried by the National Taiwan University Instrument Centre, College of Science. AC magnetic susceptibility data were collected using the Quantum Design MPMS XL7 system of the National Chiao Tung University. Oriented single crystal magnetization hysteresis loops were measured by employing a micro-SQUID array that was described elsewhere.23 A single crystal was put onto the array and external field is oriented parallel to the crystal easy axis.
3
Verifying Biomolecules in BGs via FTIR
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Fourier transform infrared
(FTIR) spectra were collected on a PerkinElmer
1600 spectrometer in the range 400–4000 cm–1 to verify the presence of biomolecules loaded on the BGs; we focused
on the characteristic bands of GA.
(FTIR) spectra were collected on a PerkinElmer
1600 spectrometer in the range 400–4000 cm–1 to verify the presence of biomolecules loaded on the BGs; we focused
on the characteristic bands of GA.
4
Characterization of Organic Compounds
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Melting points were determined with a melting point apparatus SMP3 (Barloworld Scientific Ltd., UK). 1 H NMR (500 MHz, DMSO-d 6 ) and 13 C NMR (125 MHz, DMSO-d 6 ) spectra were recorded using Bruker 500 MHz (Bruker UK Ltd, UK) and JEOL-GX 270 spectrometers (Akishima, Japan), resp. Chemical shifts were expressed in δ (ppm) as a reference TMS and coupling constant (J) in Hertz. UV spectra were determined in methanol with a UV Spectronic 601 spectrophotometer (Milton Roy, USA). IR spectra (cm -1 ) were recorded on a Perkin-Elmer 1600 spectrometer (Perkin-Elmer, USA). silica gel 60 GF 254 (Fluka, Switzerland) was used for analytical TLC. Sephadex LH-20 (25-100 µm, Sigma, USA) or silica gel (0.063-0.210 mm, Merck, Germany) were used for column chromatography. Spots were visualized by spraying with ethanolic AlCl 3 (2 %) or 10 % H 2 SO 4 under UV.
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