High-performance hquid process

Mixtures can be identified with the help of computer software that subtracts the spectra of pure compounds from that of the sample. For complex mixtures, fractionation may be needed as part of the analysis. Commercial instmments are available that combine ftir, as a detector, with a separation technique such as gas chromatography (gc), high performance Hquid chromatography (hplc), or supercritical fluid chromatography (96,97). Instmments such as gc/ftir are often termed hyphenated instmments (98). Pyrolyzer (99) and thermogravimetric analysis (tga) instmmentation can also be combined with ftir for monitoring pyrolysis and oxidation processes (100) (see Analytical methods, hyphenated instruments). 

A. Plum, G. Braun and A. Rehorek, Process monitoring of anaerobic azo dye degradation by high-performance hquid chromatography-diode array detection continuously coupled to membrane filtration sampling modules. J. ChmmatogrA, 987 (2003) 395-402. 

In this approach, a robotic dispensing system prepares the reactions, then they are studied via automated high-performance hquid chromatography (HPLC) and/or mass spectroscopy (MS) systems, and finally, the data is collected and evaluated by a computer. This may save a considerable amount of time, since the exploration of such large number of reactions without using computer-controlled processes would require an enormous amount of time. 

Amakura, Y., Okada, M., Tsuji, S. and Tonagai, Y. (2000) High performance hquid chromatographic determination with photo diode array detection of eUagic acid in fresh and processed fruits. /. Chromatogr. A, 896,87-93. 

Acrylic ESTER POLYMERS Acrylonitrile POLYMERS Cellulose esters). Engineering plastics (qv) such as acetal resins (qv), polyamides (qv), polycarbonate (qv), polyesters (qv), and poly(phenylene sulfide), and advanced materials such as Hquid crystal polymers, polysulfone, and polyetheretherketone are used in high performance appHcations they are processed at higher temperatures than their commodity counterparts (see Polymers containing sulfur). 

In this connection necessity for creation of such wet-type collectors which would work with the low charge of an irrigating hquid now has matured and combined the basic virtues of modem means of clearing of gases simplicity and compactness, a high performance, a capability of control of processes of a dust separation and optimisation of regimes. 

Iodine Pentafluoride. Iodine pentafluoride is produced by the reaction of iodine and fluorine. Because iodine has a high melting poiat, the reaction is either performed ia a solvent or the reaction is maintained at a temperature where the iodine is Hquid. In a continuous process usiug a solvent (104), ca 1% I2 is dissolved iu IF and passed to a reactor where it is contacted with F2 gas. The IF is continuously discharged from the reactor where a small portion is taken off as product and the larger portion of the stream is recycled. 

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