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000005094 0247_ $$2DOI$$a10.1002/rcm.4105
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000005094 082__ $$a530
000005094 084__ $$2WoS$$aBiochemical Research Methods
000005094 084__ $$2WoS$$aChemistry, Analytical
000005094 084__ $$2WoS$$aSpectroscopy
000005094 1001_ $$0P:(DE-Juel1)129220$$aLaumer, W.$$b0$$uFZJ
000005094 245__ $$aA novel approach for the homogenization of cellulose to use micro-amounts for stable isotope analyses
000005094 260__ $$aNew York, NY$$bWiley Interscience$$c2009
000005094 300__ $$a1934 - 1940
000005094 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article
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000005094 440_0 $$016701$$aRapid Communications in Mass Spectrometry$$v23$$x0951-4198$$y13
000005094 500__ $$aContract/grant sponsor: EU Project ISONET; contract/grant number: EV K2-2001-00147.Contract/grant sponsor: German Science Foundation (DFG); contract/grant number: HE3089/1-Pirin.
000005094 520__ $$aClimate reconstructions using stable isotopes from tree-rings are steadily increasing. The investigations concentrate mostly on cellulose due to its high stability. In recent years the available amount of cellulose has steadily decreased, mainly because micro-structures of plant material have had to be analyzed. Today, the amounts of cellulose being studied are frequently in the milligram and often in the microgram range. Consequently, homogeneity problems with regard to the stable isotopes of carbon and oxygen from cellulose have occurred and these have called for new methods in the preparation of cellulose for reliable isotope analyses. Three different methods were tested for preparing isotopically homogenous cellulose, namely mechanical grinding, freezing by liquid nitrogen with subsequent milling and ultrasonic breaking of cellulose fibres. The best precision of isotope data was achieved by freeze-milling and ultrasonic breaking. However, equipment for freeze-milling is expensive and the procedure is labour-intensive. Mechanical grinding resulted in a rather high loss of material and it is also labour-intensive. The use of ultrasound for breaking cellulose fibres proved to be the best method in terms of rapidity of sample throughput, avoidance of sample loss, precision of isotope results, ease of handling, and cost.
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000005094 588__ $$aDataset connected to Web of Science, Pubmed
000005094 650_2 $$2MeSH$$aCarbon Isotopes: analysis
000005094 650_2 $$2MeSH$$aCellulose: chemistry
000005094 650_2 $$2MeSH$$aFreezing
000005094 650_2 $$2MeSH$$aOxygen Isotopes: analysis
000005094 650_2 $$2MeSH$$aPhysics: economics
000005094 650_2 $$2MeSH$$aPhysics: methods
000005094 650_2 $$2MeSH$$aUltrasonics
000005094 650_7 $$00$$2NLM Chemicals$$aCarbon Isotopes
000005094 650_7 $$00$$2NLM Chemicals$$aOxygen Isotopes
000005094 650_7 $$09004-34-6$$2NLM Chemicals$$aCellulose
000005094 650_7 $$2WoSType$$aJ
000005094 7001_ $$0P:(DE-Juel1)VDB71222$$aAndreu, L.$$b1$$uFZJ
000005094 7001_ $$0P:(DE-Juel1)VDB3527$$aHelle, G.$$b2$$uFZJ
000005094 7001_ $$0P:(DE-Juel1)VDB1420$$aSchleser, G. H.$$b3$$uFZJ
000005094 7001_ $$0P:(DE-Juel1)VDB86088$$aWieloch, T.$$b4$$uFZJ
000005094 7001_ $$0P:(DE-Juel1)VDB50316$$aWissel, H.$$b5$$uFZJ
000005094 773__ $$0PERI:(DE-600)2002158-6$$a10.1002/rcm.4105$$gVol. 23, p. 1934 - 1940$$p1934 - 1940$$q23<1934 - 1940$$tRapid communications in mass spectrometry$$v23$$x0951-4198$$y2009
000005094 8567_ $$uhttp://dx.doi.org/10.1002/rcm.4105
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