Publication
Size exclusion chromatography of lignin in N-N-dimethylformamide/lithium bromide
| dc.contributor.author | Cateto, Carolina | |
| dc.contributor.author | Barreiro, M.F. | |
| dc.contributor.author | Belgacem, Mohamed Naceur | |
| dc.contributor.author | Rodrigues, AlĂrio | |
| dc.date.accessioned | 2010-01-30T15:45:36Z | |
| dc.date.available | 2010-01-30T15:45:36Z | |
| dc.date.issued | 2008 | |
| dc.description.abstract | The understanding of the macromolecular properties of lignin requires information on its molecular weight distributions. Size exclusion chromatography using DMF/LiBr as the mobile phase and PS-DVB gels as the stationary phase is a widely used system. In this study, two different lignin samples, Indulin-AT and Alcell, were analysed under different experimental conditions. The effect of temperature (60 and 80 ÂșC), LiBr concentration (0.1 and 0.9%, w/w) and sample preparation conditions (lignin concentration and dissolution time prior to analysis) were analysed. The influence of temperature and ionic strength on a polystyrene-based calibration curve was also studied. The two lignin samples have shown a distinct behaviour. Moreover, Alcell lignin in DMF/LiBr was found to be a viable model system to perform molecular weight investigations, particularly, those dealing with comparative studies with different molecular weight characterization techniques. With the addition of LiBr to DMF a unimodal MWD and an elution profile independent of sample concentration and used dissolution time was obtained. Moreover, a linear concentration dependence as a function of the UV response was observed. | pt |
| dc.description.sponsorship | FCT (grant SFRH/BD/18415/2004) and French-Portuguese Scientific Cooperation Programme (F-32/08). | pt |
| dc.identifier.citation | Cateto, C.A.; Barreiro, M.F.; Belgacem, M.N.; Rodrigues, A.E. (2008). Size exclusion chromatography of lignin in N-N-dimethylformamide/lithium bromide. In 10th. European Workshop on Lignocellulosics and Pulp â EWLP. Stockholm, Sueden. | pt |
| dc.identifier.uri | http://hdl.handle.net/10198/1594 | |
| dc.language.iso | eng | pt |
| dc.publisher | Royal Institute of Technology | pt |
| dc.subject | Lignin | pt |
| dc.subject | SEC | pt |
| dc.subject | DMF-LiBr | pt |
| dc.subject | Molecular weight | pt |
| dc.title | Size exclusion chromatography of lignin in N-N-dimethylformamide/lithium bromide | pt |
| dc.type | conference object | |
| dspace.entity.type | Publication | |
| oaire.citation.conferencePlace | Stockholm | pt |
| oaire.citation.issue | PII-3 | pt |
| oaire.citation.title | 10th European Workshop on Lignocellulosics and Pulp â EWLP 2008 | pt |
| person.familyName | Barreiro | |
| person.givenName | Filomena | |
| person.identifier.ciencia-id | 3418-47D5-5746 | |
| person.identifier.orcid | 0000-0002-6844-333X | |
| person.identifier.rid | L-9802-2014 | |
| person.identifier.scopus-author-id | 57188719717 | |
| rcaap.rights | restrictedAccess | pt |
| rcaap.type | conferenceObject | pt |
| relation.isAuthorOfPublication | 0391987c-ba90-488b-839a-153447ce1f0f | |
| relation.isAuthorOfPublication.latestForDiscovery | 0391987c-ba90-488b-839a-153447ce1f0f |