Liquid chromotography.

Heinrikson, R.L. and Meredith, S.C. 1984 Amino acid analysis by reverse-phase high-performance liquid chromotography Precolumn derivatization with phenylisothiocyanate. Analytical Biochemistry 136 65-74. 

All gas chromotography/mass spectrometry (GC/MS) analyses of monomers and intermediates were performed on a Finnigan 1020 GC/MS using a 30-m RSL-150 fused silica capillary column. Liquid chromatography/mass spectrometry (LC/NS) was performed on a Finnigan 4500 mass spectrometer using acetonitrile-water eluent and a moving belt LC/MS interface. 

Heteroboranes, compounds where one or more of the cage borons are replaced by a main group element (33), are not themselves commercially available. However, carborane siloxanes containing w-carborane [16986-21-6], C2H12B10, are available under the trade name of Dexsil for the stationary phase in gas—liquid chromotography (qv) (34). The carborane, l,7-dicarba- / o-dodecaborane(10) (35), contributes enhanced chemical and thermal stability to the siloxane polymer. 

Okazaki, M., and Hara, I., Analysis of cholesterol in high density lipoprotein subfractions by high performance liquid chromotography. J. Biochem. (Tokyo) 88, 1215-1218 (1980). 

Promising new analytical tools are further enzymatic analysis, coated wire electrodes, high-pressure liquid chromotography, sulfide electrode use, and use of computers for data storage and retrieval and for monitoring laboratory instrumentation. 

Early studies made of this species estimated the concentrations of psilocybin at about 0.2 percent (2.0 mg./gm) of the dry weight, along with a fairly high amount of psilocin. But the analytical tools then in use necessitated heating and are now considered obsolete. Current state-of-the-art equipment —such as High-Performance Liquid Chromotography (HPLC)—shows that much of the "psilocin observed was actually psilocybin that had been transformed into psilocin by the analytical process. 

Summers, W. R. Tewari, Y. B. Schreiber, H. P., "Thermodynamic Interaction in Polydimethyl-siloxane - Hydrocarbon Systems from Gas-Liquid Chromotography," Macromolecules, 5, 12 (1972). 

Sinclair AJ, Slattery WJ, O Dea K. The analysis of polyunsaturated fatty acids in meat by capillary gas-liquid chromotography. J Food Sci Agric 1982 33 771-776. 

Several research groups employ high-performance liquid chromotography (HPLC) analytics to monitor release [35,38,39], Possible degradation products could result in altered retention behavior, but no such observations have been published for peptides or proteins released from lipospheres. 

Samples exposed under selected combinations of the above variables have been analyzed by a variety of techniques including UV and IR spectroscopy and liquid and gel permeation chromotography. The goal of this survey has been to elucidate not only the chemical nature of the reactions occurring but also to determine where they occur in the polymer chain, since this has a primary importance in determining the degradation in physical properties due to weathering. 

Thienpont LM, Depourcq GC, Nelis HJ, et al. 1990. Liquid chromatographic determination of 2-thioxothiazolidine-4-carboxylic acid isolated from urine by affinity chromotography on organomercurial agarose gel. Anal Chem 62(24) 2673-2675. 

Trimethylsilylation of the mother liquor from the securinine crystallization obtained from Securinega suffruticosa followed by gas-liquid chromotography (GLC) revealed, aside from peaks due to allosecurinine and dihydrosecurinine, a new peak which was not observed in the GLC of the original mother liquor and which thus suggested the presence of hydroxylated alkaloids (57). Further separation led to the isolation of three alkaloids, securinol A, B, and C, whose structures were elucidated by combination spectral and degradative methods (57, 58). These alkaloids turn out to be ring C hydroxylated derivatives of the seourin-... 

Puente, P. R, Saez, M. J. R, Hamilton, B., Lehane, M., Ramsted, H., Rurey, A., and James, K. J. (2004a) Rapid determination of polyether marine toxins using liquid chromotography-muhple tandem mass spectrometry. Journal of Chromatography A, 1056, 1-2, 77-82. 

Q DCM = Oichloromethartfl Extract in Control Urine n DCM DlcWoromethene Extract In Buffer FC -Fiaeh Chromatography TL - Thin Layer Chrometography HP " High Performance Liquid Chromotography... 

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