Charcoal, adsorption

Lab method with high performance liquid chromatography after collection in an impinger containing water Charcoal adsorption tube and gas chromatography... 

Chlorinated hydrocarbon solvent vapours in air Lab method using pumped charcoal adsorption tubes, solvent desorption and gas chromatography 28... 

MDHS 1 Acrylonitrile in air Laboratory method using charcoal adsorption tubes and gas chromatography MDHS 2 Acrylonitrile in air Laboratory method using porous polymer adsorption tubes, and thermal desorption with gas chromatographic analysis... 

Four types of techniques for separating the bound fraction P Q from the reagent mixture are in common usage, loosely termed double antibody, solid phase, charcoal adsorption and solution precipitation. The first type is used with radioimmunoassay methods specifically, while the other three types can be used with both radioassay and radioimmunoassay methods. 

The employment of charcoal adsorption in hydrometallurgical processes offers several advantages (i) the process flowsheet is simplified, since thickening, washing, and filtration steps are avoided this implies a reduction in the capital as well as the operating costs, and... 

The heat sensitivity (above) may explain the explosions which occur on contact of many readily oxidisable materials with this powerful oxidant. Such materials include ammonia, potassium arsenic, antimony sulfur, charcoal (adsorptive... 

Cohen, B. L., and E. S. Cohen, Theory and Practice of Radon Monitoring with Charcoal Adsorption, Health Phys. 45 501 (1983). 

Shimo, M., Y. Ikebe, J. Maeda, R. Kamimura, K. Hayashi, and A. Ishiguro, Experimental Study of Charcoal Adsorptive Technique for Measurement of Radon in Air, J. Atomic Energy of Japan, 25 562-570... 

Cohen, B.L., A Diffusion Barrier Charcoal Adsorption Collector for Measuring Rn Concentrations in Indoor Air, Health Phys. 50 457 (1986). 

Charcoal adsorption, elute with acetone, inject acetone solution... 

Sander M, Pignatello J (2005) Characterization of charcoal adsorption sites for aromatic compounds insights drawn from single-solute and bi-solute competitive experiments. Environ Sci Technol 39 1606-1615... 

Yuan, J., Yang, D.C., Birkmeier, J. and Stolzenbach, J. (1995) Determination of protein binding by in vitro charcoal adsorption. Journal of Pharmacokinetics and Biopharmaceutics, 23, 41-55. 

Doyle, G. J., P. J. Bekowies, A. M. Winer, and J. N. Pitts, Jr., Charcoal-Adsorption Air Purification System for Chamber Studies Investigating Atmospheric Photochemistry, Environ. ScL TechnoL, 11, 45-51 (1977). 

Perhaps the hypersorption process (7) of recent years may be thought new and it is new in applying the mechanical principle of continuous operation to charcoal adsorption, but such adsorption on a batch process was in use more than 25 years ago and became obsolete in competition with absorption. Now the continuous hypersorption method appears to be finding a real field of usefulness, especially in making very high recoveries of propane and in recovering substantial amounts of ethane. Recovery of ethane is beginning to be important, in connection with its use as a chemical raw material for the reactions mentioned previously in this paper. 

In 1948, red cobalt-containing crystals of vitamin B12 were obtained almost simultaneously by two pharmaceutical firms. Charcoal adsorption from liver extracts was followed by elution with alcohol and numerous other separation steps. Later fermentation broths provided a richer source. Chemical studies revealed that the new vitamin had an enormous molecular weight, that it contained one atom of phosphorus which could be released as P , a molecule of aminopropanol, and a ribofuranoside of dimethyl benzimidazole with the unusual a configuration. 

Thus, the filtrate, after charcoal adsorption, contains a mixture of at least two inhibitors an inorganic component which is inhibitory after ashing and an organic component (organic inhibitor A) which is responsible for most of the total inhibitory activity and is destroyed by ashing. 

Table II. Effect of Repeated Charcoal Adsorptions on Ceratoma Extract...

Eluate 1. Eluate from first charcoal adsorption, etc. 

The heat sensitivity (above) may explain the explosions which occur on contact of many readily oxidisable materials with this powerful oxidant. Such materials include ammonia, potassium arsenic, antimony sulfur, charcoal (adsorptive heating may also contribute) calcium phosphide, phosphine, phosphorus hydrogen sulfide, antimony sulfide, barium sulfide, mercury sulfide and tin sulfide [1], Various organic materials (paper, cork, rubber, turpentine, etc.) behave similarly [2]. Mixtures with hydrogen detonate on ignition [1]. 

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