Control, chromatographic

Medium from chromatographed control terrarium suggests that peak 2 is represented by organic components of Murashige and Skoog salts. A subsequent run of aqueous Murashige and Skoog salts also demonstrated a similar curve. Nevertheless, peak 2 was collected, lyophilized, and tested in each bioassay in order to determine whether additional phytotoxic compounds were present. 

The methods used in the previous section can be easily extended to closedloop sampled-data systems. Let us first consider a chromatograph control loop, as shown in Fig. 18.12a. The output of the process is... 

N. A. Farid, L. M. Atkins, G. W. Becker, A. Dinner, R. E. Heiney, and D. J. Miner, Liquid chromatographic control of the identity, purity and potency of biomolecules used as drugs, J. Pharm. Biomed Anal., 7 185(1989)... 

J. Alary and M. F. Vergnes, High-performance liquid chromatographic control of drugs containing caffeine, Ann. Pharm. Fr., 42 249(1984). 

Data Collection Devices Modem data stations receive and store detector output and print out chromatograms complete with peak heights, peak areas, sample identification, and method variables. They are also used to program the liquid chromatograph, controlling most variables and providing for long periods of unattended operation. 

Equilibrium, Kinetic, and Chromatographic Controls of the Solution Composition Obtained during the in situ Leaching of a Uranium Orebody... 

Sucrose and its hydrolysis products (D-glucose and D-fhictose) have been prime sources for the manufacture of caramel - - - despite the fact that reducing sugars are caramelized more readily than nonreducing sugars. The chromatographically controlled caramelization of sucrose has revealed that. 

The chromatographic control of resolution is a function of several factors. The fundamental resolution equation is... 

The chemistry of sucrose (A), often termed Sucro-chemistry, has played a speciaT role in our studies of carbohydrates in view of its ubiquity and great importance in commerce. Our interest has been concentrated upon stereoselective chemical reactions, in the main by replacement of specific hydroxyl groups by other functional groups. The considerable progress made in this field, despite the complexities associated with the chemistry of this unique molecule, have been due to the application of mass spectrometry, n.m.r. and n.m.r. to the structure determination of the products obtained by simple but effective chromatographic control and, in the case of complex mixtures of products, through purification by column chromatography. 

Several chromatographic control systems exist, providing essentially the above funetions, but by way of example I have selected to describe that used on Amicon chromatographs with which I am most familiar. 

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