Chromatography dedicated controller

LKB 4151 Alpha Plus Alpha Plus is a fully automated and dedicated analyser, this turnkey system has been carefully designed to give a truly robust chromatography. Stepwise elution with up to five buffers plus flexible temperature control guarantees optimal separations from even... 

Vibrational spectroscopy, in the form of mid-IR, NIR and Raman spectroscopy has been featured extensively in industrial analyses, both quality control (QC), process monitoring applications and held-portable applications [1-6]. The latter has been aided by the need for advanced instrumentation for homeland security and related HazMat applications. Next to chromatography, it is the most widely purchased classihcation of instrumentation for these measurements and analyses. Spectroscopic methods in general are favored because they are relatively straightforward to apply and to implement, are rapid in terms of providing results, and are often more economical in terms of service, support and maintenance. Furthermore, a single spectrometer or spectral analyzer, in a near-line application, may serve many functions, whereas chromatographs (gas and liquid) tend to be dedicated to only a few methods at best. 

Many FT-IR spectrometers have external ports for optical coupling to dedicated accessories. The IR radiation is conveniently directed to/from the external ports by computer-controlled flip mirrors. A large variety of accessories, like an IR microscope, interfaces for gas chromatography (GC/FT-IR), liquid chromatography (HPLC/FT-IR), thin layer chromatography FT-IR (TLC/FT-IR), etc., is commercially available. This type of method combination is usually called a hyphenated technique. FTIR spectrometers can even be supplemented by a FT-Raman accessory. The versatile combination of FT-IR spectrometers with other instruments has substantially contributed to their abundance in most analytical laboratories. 

HPLC equipment dedicated to high-osmotic-pressure chromatography is used for the fractionation of narrow polymer fractions from broad distribution samples. This technique, which employs columns that are packed with a control pore glass of very narrow pore distribution, separates polymers by molecular weight as a function of osmotic pressure. When this approach is coupled with a fraction collector the technique can generate polymer fractions in significant quantities for further study by nuclear magnetic resonance, (NMR), FTIR, or other spectroscopic techniques. This technique can offer superior resolution to the previously mentioned preparative GPC. This technique has been applied to the characterization of both copolymers and homopolymers. 

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