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This paper presents a study of the migration of inorganic ions on thin layers of silica gel employing acetone and nitric acid mixtures as solvents. According to the trend of their R F values with increasing acid percentage, ions are divided into five groups: ions of low or zero mobility, ions of...
The author has investigated optimum elution and detection conditions for gas chromatographic determination of hydrogen sulphide and sulphur dioxide traces, between 10 and 1000 ppm, in an inert gas. It was found that only by reducing contact between effluent and metal surfaces, a general use of...
From a theoretical treatment it follows that the usual equations describing the sensitivity of the catharometer should be corrected by a term which becomes zero for four filament catharometers. It is found also, supported by experiments, that the thermal conductivity detector operating with a...
A sampling process for the effluent of a naphtha-cracker furnace is described. This simple process has been operating permanently in our industrial units for more than two years in a very satisfactory way. The chromatographic analysis is carried out after a pneumatic transmission of samples. The...
Thin-layer chromatography technique was employed to separate the amino acids present in the petroprotein hydrolysate obtained under different experimental conditions. The hydrolysates were studied both in one-dimensional and two-dimensional solvent system(s). Eighteen amino acids were identified...
The recovery of each of eleven common hydrocarbons found in atmospheric dust has been determined. Thin-layer chromatography in two directions has been found necessary for their separation. The best solvent for their extraction was found to be cyclohexane which is also a convenient solvent for...
Monofunctional aniline, pyridine and quinoline derivatives were chromatographed using thin layers of widepore silica and binary solvents composed of cyclohexane and a polar solvent. It was shown that in most cases the R M values of the solutes were linearly dependent on the logarithm of the mole...
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