Development of a rapid method for the quantification of cellulose in tobacco by 13 C CP/MAS NMR

Jiang, Jinhui; Hu, Yonghua; Zhang, Tian; Chen, Kaibo; Ge, Shenguang; Tian, Dong; Yang, Jun

doi:10.1016/j.carbpol.2015.08.084

Cited by 11 publications

(6 citation statements)

References 38 publications

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“…3: Chemical structure of α-pinene and OMCTS [69] of the RSD was <1.49 %. These data suggest that the proposed method can be used for quantitative analysis of cellulose in tobacco with a quite high degree of consistency among the results under the same conduction [70] .…”

Section: Octamethylcyclotetrasiloxanesupporting

confidence: 52%

Recent Development in Nuclear Magnetic Resonance as a Technique for Quantitative Method Validation

Sahu¹,

Kumar²,

Mishra³

et al. 2021

ijps

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Sahu et al.: Review on Use of Nuclear Magnetic Resonance for Quantitative Method Validation Nuclear magnetic resonance spectroscopy has largely given way for most important routine analysis of natural, synthetic drug candidate and related molecules. The quality control and simultaneous quantitation of different residual solvents, analytes and impurities have led analysts to further exploit nuclear magnetic resonance as a viable quantitative technique. Hence, this review focuses on the use and feasibility of this technique for quantitative method validation of drug and related compounds. Validated quantitative nuclear magnetic resonance methods were simple, robust, accurate and selective for evaluating different natural and synthetic samples using various commercially accessible compounds as internal standards. In this review numerous examples are cited giving proof of advancement in nuclear magnetic resonance technology and also for precise evaluation of molecular structures of substances in solids and liquid. Studied examples of different concurrent validation methods in the review shows that the results obtained is precise with less standard deviation when compared with other chromatography techniques.Concluding the entire review, various methodologies used for quantification and validations were reflected that proved to be a specific, selective and alternative means of method validation and it can be summarized that nuclear magnetic resonance is as reliable as the chromatography-based technique for quantitative analysis providing accuracy.

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Section: Octamethylcyclotetrasiloxanesupporting

confidence: 52%

Recent Development in Nuclear Magnetic Resonance as a Technique for Quantitative Method Validation

Sahu¹,

Kumar²,

Mishra³

et al. 2021

ijps

View full text Add to dashboard Cite

show abstract

“…339,344 To bypass exceedingly long 13 C T 1 relaxation times, CP is preferred to DP, as it is well adapted for rigid cellulose and lignin, notably when internal references are used to quickly calibrate the polarization transfer efficiency between samples. 345 For example, celery is a model plant with two types of primary cell walls (parenchyma and collenchyma). This plant has been used in comparative NMR studies to elaborate 1D CP and DP methods for discriminating different sugars.…”

Section: Polymer Contacts In Secondary Cell Wallsmentioning

confidence: 99%

Solid-State NMR Investigations of Extracellular Matrixes and Cell Walls of Algae, Bacteria, Fungi, and Plants

et al. 2021

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Extracellular matrixes (ECMs), such as the cell walls and biofilms, are important for supporting cell integrity and function and regulating intercellular communication. These biomaterials are also of significant interest to the production of biofuels and the development of antimicrobial treatment. Solid-state nuclear magnetic resonance (ssNMR) and magic-angle spinning-dynamic nuclear polarization (MAS-DNP) are uniquely powerful for understanding the conformational structure, dynamical characteristics, and supramolecular assemblies of carbohydrates and other biomolecules in ECMs. This review highlights the recent high-resolution investigations of intact ECMs and native cells in many organisms spanning across plants, bacteria, fungi, and algae. We spotlight the structural principles identified in ECMs, discuss the current technical limitation and underexplored biochemical topics, and point out the promising opportunities enabled by the recent advances of the rapidly evolving ssNMR technology.

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“…The 13 C NMR spectra were taken to quantitatively determine the different types of carbon structure present in coal. 31–33 We adopted the peak fitting method from Satoru Murata 24 to separate the 13 C NMR spectra. Fig.…”

Section: Resultsmentioning

confidence: 99%

Correlating micro/meso pore evolution and chemical structure variation in a mild thermal treatment of a subbituminite

Han

et al. 2018

RSC Adv.

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This work investigates the evolution of micro/meso pores during a mild thermal treatment of subbituminous coal based on the observation of coal structure changes with the gradual detachment of organic matter from the coal. Pores in coal can be described as super-micropores (d < 1 nm), micropores (1 nm < d < 2 nm) and mesopores (2 nm < d < 50 nm). The decomposition of the carboxyl group at 200 C decreases the super-micropore volume. A mild and sustained reaction takes place at 300 C to gradually change the aromaticity and CH 2 /CH 3 ratio of the treated coal. The amount of micropore structure sharply decreases in the early stages of heating, while the amount of mesopore structure continuously decreases during the whole process. A dramatic reaction takes place at 400 C to sharply change the aromaticity and CH 2 /CH 3 ratio of the treated coal, while the detachment of volatile compounds from the coal matrix caused an evident variation in the mesopore structure of the coal. The aromaticity and CH 2 / CH 3 ratio of coal organics are found to correlate with the volumes of super-micropores and mesopores, respectively. The super-micropores are identified as comprising the inter-layer distance between stacks of aromatic rings, and mesopores are the spaces between macromolecular aromatic rings which are inter-connected via aliphatic chains. rsc.li/rsc-advances 9754 | RSC Adv., 2018, 8, 9754-9761 This journal is

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Development of a rapid method for the quantification of cellulose in tobacco by 13 C CP/MAS NMR

Cited by 11 publications

References 38 publications

Recent Development in Nuclear Magnetic Resonance as a Technique for Quantitative Method Validation

Recent Development in Nuclear Magnetic Resonance as a Technique for Quantitative Method Validation

Solid-State NMR Investigations of Extracellular Matrixes and Cell Walls of Algae, Bacteria, Fungi, and Plants

Correlating micro/meso pore evolution and chemical structure variation in a mild thermal treatment of a subbituminite

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