Liquids like gasoline comprise a mixture of hundreds of hydrocarbon components. Gas chromatography of these complex mixtures produces highly detailed chromatograms that are characteristic of a particular sample. Although many of the volatile components will be lost during the fire, sufficient less-volatile components may have been left in partially burned wood or other materials to enable the d...

We describe a simple, rapid, and inexpensive unidimensional high-resolution thin-layer chromatographic procedure for screening for aminoacidopathies in newborns. Protein-free filtrates are prepared for ultrafiltration of as little as 10 z1of plasma. A rapid, inexpensive photographic method provides large, high-contrast pictures of the chromatograms for permanent records. A day’s samples can be ...

Data in this article illustrate representative fucoxanthin chromatograms of a microalga, Chaetoceros calcitrans; a macroalga, Saccharina japonica and; a pure fucoxanthin standard. High performance liquid chromatography (HPLC) eluted fucoxanthin at the 7.008±0.024th min. This data article refers to the research article ''Antioxidant capacities of fucoxanthin-producing algae as influenced by thei...

Urine from normal and leukemic subjects on controlled low-purine diets was frac tionated by ion-exchange column chromatography, and the various effluent peaks exhibiting absorbance at 260 m/i were subjected to two-dimensional filter paper chromatography for further resolution. It appeared from gross examination of the chromatograms that there were a greater number and concentration of blue fluo...

Hydrolysis data for Bis(3-(3,4-dicyanophenoxy)phenyl) phenyl phosphate and Bis(3-(3,4-dicyanophenoxy)phenyl) phenylphosphonate under pH 4, 7 and 10 are presented. Conversion/time plots collected by HPLC analysis, typical chromatograms and NMR spectra of the reactions products are given. Pseudo-first order rate constants are determined for both substrates at 25, 50 and 80 °C. Activation paramete...

Small quantities of silver in technical aluminum can be determined by TLC on the layer of microcrystalline cellulose after separation and concentration by coprecipitation with CdS. The chromatograms were developed by a solvent composed of butanol-methanol-water-nitric acid in the proportion 80 : 5 : 10 : 5 (v/v). Visualisation was made with hydrogen sulfide. After scanning the obtained spots, c...

This Application Note describes the development of reliable quality control methods for analysis of individual traditional Chinese medicines (TCMs) and TCM formulations using rapid resolution liquid chromatography with UV-visible and quadrupole mass spectrometry detection. The chromatograms obtained with UV and MS detection for different individual TCMs are compared and the combination of UV an...

Knight has recently studied the movement of nineteen amino acids and thirty-four peptides on paper chromatograms (1). It seemed possible that from these data a general method of calculating the movement of a peptide relative to the movement of the solvent front (RI) could be obtained. Such calculations have been attempted in a simple, straightforward manner without utilizing any special factors...

Mass Profiler Professional (MPP), a multivariate statistical program, was applied to complex mass spectral chromatograms from 18 combined samples to tease out differences that arise from the metabolism of the pesticide imidacloprid, when applied to onions. The purpose of MPP, in general, is to assist in analyzing the complex mass spectral data that arise when high resolution accurate mass profi...

Soluble proteins of rhabdomyosarcoma and normal muscle were chromatographed and separated into a number of peaks by gradient elution from DEAE cellulose. The chromatographic patterns were different in the two tissues studied. Various enzymatic activities were determined in the fractions and localized in the chromatograms of both muscle and rhabdomyosarcoma. Some of the enzymes tested appeared i...