Stufenweise Elutionsanalyse von Carboxymethylstärke /
Paperchromatographic elution separation with perchloric acid solutions of different molarities were carried out with synthesized carboxymethylated starches (CMS) of the following degrees of substitution (DS): 0,30, 0,58, 1.09 and 2,17. On the basis of occuring coloured sections in comparision with t...
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| Format: | Book Chapter |
| Jezik: | German |
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Die Stärke |
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| LEADER | 02032naa a2200217 ib4500 | ||
|---|---|---|---|
| 001 | 5079830 | ||
| 003 | SI-MaCOB | ||
| 005 | 20000121000000.0 | ||
| 008 | 000121s1975 gw |||||||||||||| ||ger c | ||
| 040 | |a KTFMB |b slv |c SI-MaIIZ |d KTFMB |e ppiak | ||
| 041 | 0 | |a ger |b eng | |
| 080 | |a 664 | ||
| 100 | 1 | |a Čeh, Mirko, |d 1923-2013. |4 aut | |
| 242 | 1 | 0 | |a Stepwise elution analysis of carboxymethyl starch. |y eng |
| 245 | 0 | 0 | |a Stufenweise Elutionsanalyse von Carboxymethylstärke / |c von M. Čeh und Č. Stropnik. |
| 300 | |a str. 72-76. | ||
| 520 | |a Paperchromatographic elution separation with perchloric acid solutions of different molarities were carried out with synthesized carboxymethylated starches (CMS) of the following degrees of substitution (DS): 0,30, 0,58, 1.09 and 2,17. On the basis of occuring coloured sections in comparision with those of native starch is subjected during the CMS-synthesis to a partial degradation. A comparision of the chromatograms of the starch ethers indicatesfor higher DS a change into violet colours, a fading of these colour intensities and an arising of new coloured sections which were separated by lower concentrations of perchloric acid. Already at a degree of substitution of 2,17 any coloured sections are lacking. Induced carboxymethyl-groups in the course of the synthesis prevent the formation of the iodine complex of amylose and the amylopectin-iodine reaction. At defined of the CMS-synthesis the paperchromatographic elution separation makes it possible to evaluate the approximate degree of substitution of starch on the basis of the occuring coloured sections and colour shades. | ||
| 653 | 0 | |a organska kemija |a škrob |a karboksilmetilni škrob |a papirna kromatografija |a stopenjska elucija |a ločevanje škroba v konstituenti | |
| 653 | 0 | |a organic chemistry |a starch |a carboxymethyl starch |a paper chromatography |a stepwise elution |a separation of starch | |
| 700 | 1 | 2 | |a Stropnik, Črtomir. |4 aut |
| 773 | 0 | |t Die Stärke |d Weinheim : VCH-Verlagsgesellschaft, 1949- |x 0038-9056 |g Jhrg. 27, Hf. 3 (1975), str. 72-76 | |