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Avance 3 hd 400 mhz instrument

Manufactured by Bruker
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Sourced in Germany

The Avance III HD 400 MHz instrument is a high-performance nuclear magnetic resonance (NMR) spectrometer designed for various analytical applications. It operates at a frequency of 400 MHz and is capable of performing advanced NMR experiments to characterize and analyze chemical compounds and materials.

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Lab products found in correlation

400 mhz dmx instrument, by Bruker (2 mentions) Multinuclear inversez grad probe, by Bruker (2 mentions) Mestrenova, by Mestrelab Research (2 mentions) E 1010 ion sputterer, by Hitachi (1 mentions) Regulus 8220, by Hitachi (1 mentions)

5 protocols using avance 3 hd 400 mhz instrument

1

Structural Characterization of Lignocellulosic Extracts

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HSQC NMR experiments
were performed
for the structural characterization and semi-quantification of hemicelluloses
and lignin in the extracts. A Bruker 400 MHz DMX instrument (Bruker
Corporation, Billerica, MA, USA) equipped with a multinuclear inverse
Z-grad probe was used. The pulse sequence was hsqcetgpsi. The pulse
length was optimized at 9.2 s with a 1.49 s relaxation delay and 176
scans per sample. For each experiment, approximately 70 mg of sample
was dissolved in 550 μL of DMSO-d6. Phase correction in the spectra was performed manually, and baseline
correction was performed using a third-order Bernstein polynomial
fit. Peak assignment was made according to previous work.11 (link),23 (link),24 (link) Calculations on the quantification
of interunit linkages are provided as Supporting Information.
31P NMR experiments were conducted
according to previous work,25 (link) following
the protocol by Argyropoulos.26 (link) Peak assignments
were made according to the study by Pu et al.27 (link) A Bruker Avance III HD 400 MHz instrument with a BBFO probe equipped
with a Z-gradient coil was used. The pulse sequence zgig30 was used,
with 256 scans and a relaxation delay (D1) of 6 s. The spectra were
processed with MestreNova (Mestrelab Research).
Sapouna I., van Erven G., Heidling E., Lawoko M, & McKee L.S. (2023). Impact of Extraction Method on the Structure of Lignin from Ball-Milled Hardwood. ACS Sustainable Chemistry & Engineering, 11(43), 15533-15543.
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2

NMR Characterization of Polyurethane Polymers

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1H NMR and 13C NMR spectra of the WPU-10 and WPU-C were
measured by an Avance III HD 400 MHz Instrument (Bruker Co., Germany)
with deuterated dimethyl sulfoxide (DMSO-d6) as the solvent.
Zhang M., Zhao F, & Luo Y. (2019). Self-Healing Mechanism of Microcracks on Waterborne Polyurethane with Tunable Disulfide Bond Contents. ACS Omega, 4(1), 1703-1714.
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3

1H-NMR Characterization of MDAAC and CWPU

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The 1H-NMR spectra of the MDAAC and CWPU were measured by an Avance III HD 400 MHz Instrument (Bruker Co., Germany) with deuterated dimethyl sulfoxide (DMSO-d6) as the solvent.
Dong C., Xin W, & Luo Y. (2018). Synthesis and application of a cationic waterborne polyurethane fixative using quaternary ammonium diol as a chain extender. RSC Advances, 8(73), 42041-42048.
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4

Detailed Scanning Electron Microscopy and 13C NMR Analysis

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Scanning electron microscopy (SEM)
images were taken with a Regulus 8220 (Hitachi, Japan), scanned at
an acceleration voltage of 5 kV at a magnification of 1000× and
2000×. A small number of specimens were evenly placed into the
loading platform, and the surface of the samples was plated for 2
min using an E-1010 ion sputterer (Hitachi, Japan).21 (link)NMR spectra of 13C CP/MAS solids from
0 to 270 ppm were tested using a BRUKER AVANCE III HD 400 MHz instrument
(Bruker, Switzerland) at a spectral resolution of 0.1 ppm. The lignin
sample was dissolved with dimethyl sulfoxide and placed on an NMR
spectrometer to measure the 13C NMR spectrum. Its signal
properties were resolved using MestReNova12 software and compared
with the literature.
Cai Z., Zhang W., Zhang J., Zhang J., Ji D, & Gao W. (2022). Effect of Ammoniated Fiber Explosion Combined with H2O2 Pretreatment on the Hydrogen Production Capacity of Herbaceous and Woody Waste. ACS Omega, 7(25), 21433-21443.
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5

Structural Characterization of Lignocellulosic Extracts

Check if the same lab product or an alternative is used in the 5 most similar protocols
HSQC NMR experiments
were performed
for the structural characterization and semi-quantification of hemicelluloses
and lignin in the extracts. A Bruker 400 MHz DMX instrument (Bruker
Corporation, Billerica, MA, USA) equipped with a multinuclear inverse
Z-grad probe was used. The pulse sequence was hsqcetgpsi. The pulse
length was optimized at 9.2 s with a 1.49 s relaxation delay and 176
scans per sample. For each experiment, approximately 70 mg of sample
was dissolved in 550 μL of DMSO-d6. Phase correction in the spectra was performed manually, and baseline
correction was performed using a third-order Bernstein polynomial
fit. Peak assignment was made according to previous work.11 (link),23 (link),24 (link) Calculations on the quantification
of interunit linkages are provided as Supporting Information.
31P NMR experiments were conducted
according to previous work,25 (link) following
the protocol by Argyropoulos.26 (link) Peak assignments
were made according to the study by Pu et al.27 (link) A Bruker Avance III HD 400 MHz instrument with a BBFO probe equipped
with a Z-gradient coil was used. The pulse sequence zgig30 was used,
with 256 scans and a relaxation delay (D1) of 6 s. The spectra were
processed with MestreNova (Mestrelab Research).
Sapouna I., van Erven G., Heidling E., Lawoko M, & McKee L.S. (2023). Impact of Extraction Method on the Structure of Lignin from Ball-Milled Hardwood. ACS Sustainable Chemistry & Engineering, 11(43), 15533-15543.
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