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      Representative office Burkert Contromatic GesmbH Russia
      Leninsky Prospekt , d. 113/1, office E-715
      117198 Moscow
      Телефон +7 495 510 6180
      Факс +7 495 510 6181
      Эл. почта vasb.eh@ohexreg.pbz
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      Bürkert Contromatic G.m.b.H.
      Diefenbachgasse 1-3
      A-1150 Vienna
      Телефон +43 1 8941333
      Факс +43 1 894 1300
      Эл. почта vasb@ohrexreg.ng
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      St. Petersburg and Northwest Region, Urals FCS & Automatic JSC
      Chapaeva Str. 17
      RU-197101 St.Petersburg
      Телефон +7 812 7404980, 3254277
      Факс +7 812 3203170, 3254277
      Эл. почта spf@ohexreg.fco.eh
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      Moscow Region & Central Russia OOO „Ventar“
      Ul. Tkatskaya d. 1,
      Moscow
      Телефон +7 495 660077 5
      Факс +7 495 646 58 36
      Эл. почта vasb@iragne.eh
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Liquid chromatography

"Chromatography" is an umbrella term covering physical methods in which substances are separated via distribution between a stationary and mobile phase.

HPLC (High-Performance Liquid Chromatography) is a separating process in which a liquid sample is transported through a stationary phase under high pressure. Depending on the nature of the interaction between the phases and the sample, we distinguish between adsorption chromatography, partition chromatography, ion-exchange chromatography, sizeexclusion chromatography and affinity chromatography. The processes of adsorption chromatography and partition chromatography are the chief processes used in HPLC. HPLC uses partition particles with grain sizes of a few µm; it thus achieves high numbers of plates or trays, but at the same time, requires a high counter-pressure to be overcome during transport of the mobile phase through the thin separation column (of a few millimeters diameter). All parts must be interconnected without any dead volume wherever possible and must be pressure-stable (up to 300 bar).