Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Droplet countercurrent

Figure 8.5 Apparatus for liquid extraction. A, bubblers and iepingers B, lighter-than and heavy-than water continuous liquid-liquid extractors c, droplet countercurrent chronatograph. Figure 8.5 Apparatus for liquid extraction. A, bubblers and iepingers B, lighter-than and heavy-than water continuous liquid-liquid extractors c, droplet countercurrent chronatograph.
Soxhlet extraction of the dry gum (250 g) serially with hexanes, ether, and methanol resulted in an activity rich ether fraction (600 mg, dried in vacuo) that was partitioned between CCI4 and 50% aqueous MeOH. The dried aqueous layer (300 mg) was applied directly to droplet countercurrent chromatography (DCC), CgHg/MeOH/CHC /H ... [Pg.57]

Rauwald, H W, Preparative separation of the diastereomeric aloins by droplet countercurrent chromatography (DCCC), Arch. Pharm. (Weinheim, Ger.), 315, 769-772, 1982. [Pg.353]

The analysis of the mobile-phase fractions collected at the outlet of column is the oldest method used in CCC (droplet countercurrent chromatography and rotation locular countercurrent chromatography) to elucidate the quality of separation and to characterize solutes. With modern CCC, such as CPC, CCC type J, and crossaxis, numerous apphcations have been described for preconcentration and preparative chromatography. [Pg.515]

Raw material can be injected into the column without any previous sample treatment, which simplifies the purification procedure. Oka et al. [1] have gathered antibiotics purification by CCC from crude extract and fermentation broth. They have shown that CCC has been successfully applied to the separation of macrolides and of various antibiotics, including various peptide antibiotics which are generally strongly adsorbed to silanol groups on silica gel used in the stationary phase in HPLC. Several CCC types are used, such as DCCC (droplet countercurrent chromatogra-... [Pg.1457]

The development of CCC began in the mid-1960s. Among various types of CCC modes for the separation of flavonoids, the main techniques are droplet countercurrent chromatography (DCCC), rotary locular countercurrent chromatography (RLCCC), and centrifuge partition... [Pg.1466]

Strauss, C.R., Gooley, P.R., Wilson, B., and Williams, RJ. (1987a). Application of droplet countercurrent chromatography to the analysis of conjugated forms of terpenoids, phenols, and other constituents of grape juice, J. Agric... [Pg.6]

PTLC is cost-effective compared to the instmmentation required for HPLC and droplet countercurrent chromatography. [Pg.229]

The centrifugal droplet countercurrent instrument is available from Sanki Engineering, Ltd., Imazato 2-16-17, Nagaoka-cho, Kyoto, Japan 617... [Pg.250]

Hostettmann, K. Appolonia, C. Domon, B. Hostettmann, M. Droplet countercurrent chromatography—new applications in natural products chemistry. J. Liq. Chromatogr. 1984, 7, 231-242. [Pg.88]

One form of CCC, which has been sporadically applied to separate essential oils into fractions or in the ideal case into individual pure components, is droplet countercurrent chromatography (DCCC). The device, which has been developed by Tanimura et al. (1970), consists of 300 600 glass tubes, which are connected to each other in series with Te on tubing and lied with a stationary liquid. Separation is achieved by passing droplets of the mobile phase through the columns, thus distributing... [Pg.23]

See other pages where Droplet countercurrent is mentioned: [Pg.386]    [Pg.511]    [Pg.7]    [Pg.3]    [Pg.936]    [Pg.48]    [Pg.248]    [Pg.248]    [Pg.422]    [Pg.457]    [Pg.654]    [Pg.878]    [Pg.186]    [Pg.23]    [Pg.41]    [Pg.48]    [Pg.57]    [Pg.20]    [Pg.38]    [Pg.864]    [Pg.724]    [Pg.27]    [Pg.28]   


SEARCH



Chromatography, droplet countercurrent DCCC)

Countercurrent

Droplet countercurrent chromatography

© 2024 chempedia.info