Characterization of Methanol−Water and Acetonitrile−Water Association Using Multivariate Curve Resolution Methods

2000 ◽  
Vol 72 (9) ◽  
pp. 1956-1963 ◽  
Author(s):  
Shalini Nigam ◽  
Anna de Juan ◽  
Rachel J. Stubbs ◽  
Sarah C. Rutan
Keyword(s):  
Multivariate Curve Resolution ◽  
Curve Resolution ◽  
Water Association

Characterization of drug–cyclodextrin formulations using Raman mapping and multivariate curve resolution

2011 ◽  
Vol 56 (1) ◽  
pp. 38-44 ◽  
Author(s):  
Balázs Vajna ◽  
István Farkas ◽  
Attila Farkas ◽  
Hajnalka Pataki ◽  
Zsombor Nagy ◽  
...  
Keyword(s):  
Multivariate Curve Resolution ◽  
Raman Mapping ◽  
Curve Resolution

scholarly journals Characterization of phosphate structures in biochar from swine bones

2012 ◽  
Vol 47 (5) ◽  
pp. 672-676 ◽  
Author(s):  
Etelvino Henrique Novotny ◽  
Ruben Auccaise ◽  
Marcia Helena Rodrigues Velloso ◽  
Juliano Corulli Corrêa ◽  
Martha Mayumi Higarashi ◽  
...  
Keyword(s):  
Principal Component Analysis ◽  
Principal Component ◽  
Multivariate Curve Resolution ◽  
Resonance Spectroscopy ◽  
Curve Resolution ◽  
Lower Solubility ◽  
Symmetry Properties ◽  
Resolution Analysis ◽  
Alternative Methodology

The objective of this work was to develop an alternative methodology to study and characterize the phosphate crystalline properties, directly associated with solubility and plant availability, in biochar from swine bones. Some phosphate symmetry properties of pyrolyzed swine bones were established, using solid state nuclear magnetic resonance spectroscopy, principal component analysis, and multivariate curve resolution analysis, on four pyrolyzed samples at different carbonization intensities. Increasing carbonization parameters (temperature or residence time) generates diverse phosphate structures, increasing their symmetry and decreasing the crossed polarizability of the pair ¹H-31P, producing phosphates with, probably, lower solubility than the ones produced at lower carbonization intensity. Additionally, a new methodology is being developed to study and characterize phosphate crystalline properties directly associated with phosphate solubility and availability to plants.

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