Getting Closer to Absolute Molar Masses of Technical Lignins
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F18%3A39912731" target="_blank" >RIV/00216275:25310/18:39912731 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1002/cssc.201801177" target="_blank" >http://dx.doi.org/10.1002/cssc.201801177</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/cssc.201801177" target="_blank" >10.1002/cssc.201801177</a>
Alternative languages
Result language
angličtina
Original language name
Getting Closer to Absolute Molar Masses of Technical Lignins
Original language description
Determination of molecular weight parameters of native and, in particular, technical lignins are based on size exclusion chromatography (SEC) approaches. However, no matter which approach is used, either conventional SEC with a refractive index detector and calibration with standards or multi-angle light scattering (MALS) detection at 488nm, 633nm, 658nm, or 690nm, all variants can be severely erroneous. The lack of calibration standards with high structural similarity to lignin impairs the quality of the molar masses determined by conventional SEC, and the typical fluorescence of (technical) lignins renders the corresponding MALS data rather questionable. Application of MALS detection at 785nm by using an infrared laser largely overcomes those problems and allows for a reliable and reproducible determination of the molar mass distributions of all types of lignins, which has been demonstrated in this study for various and structurally different analytes, such as kraft lignins, milled-wood lignin, lignosulfonates, and biorefinery lignins. The topics of calibration, lignin fluorescence, and lignin UV absorption in connection with MALS detection are critically discussed in detail, and a reliable protocol is presented. Correction factors based on MALS measurements have been determined for commercially available calibration standards, such as pullulan and polystyrene sulfonate, so that now more reliable mass data can be obtained also if no MALS system is available and these conventional calibration standards have to be resorted to.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10404 - Polymer science
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
ChemSusChem
ISSN
1864-5631
e-ISSN
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Volume of the periodical
11
Issue of the periodical within the volume
18
Country of publishing house
GB - UNITED KINGDOM
Number of pages
10
Pages from-to
3259-3268
UT code for WoS article
000445178400027
EID of the result in the Scopus database
2-s2.0-85052452893