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Detectors for PLC - Cells and Separpass

PLCC15Preparative cells for Ecom photometric detectors can be divided into two groups. Standard inner cells are situated inside the detector unit and connection with the column is made by stainless steel or PTFE made tubing. External cells are situaterd on the column output and are connected to the detector by optical fiber cables.

Preparative cell PLCC 3L
Optical path 0.3 mm cell volume cca. 80 μl
Optical path 1.9 - 2.1 mm cell volume ca. 100 μl
Optical path 3.7 - 3.9 mm cell volume ca. 120 μl
Maximum flow-rate 3 L/min.
Cell connecting tubing with OD 3/16" and thread 5/16"-24
Used materials stainless steel, fused silica, PTFE
Weight 70 g
Dimensions 36 x 23 mm


Preparative Cell PLCC 04

Optical path 0.3 - 0.4 mm cell volume ca. 40 μl
Optical path 1.3 - 1.4 mm cell volume ca. 55 μl
Optical path 2.3 - 2.4 mm cell volume ca. 70 μl
Maximum flow-rate 200 ml/min.
Internal diameter of inlet capillaries 1mm
External diameter of inlet capillaries 1/16"
Used materials stainless steel, PEEK, fused silica
Casing dimensions Diameter of set up 38 mm; External casing diameter 18 mm
Weight 70 g


Preparative Cell PLCC 05
Optical path 0.3 - 0.4 mm cell volume ca. 40 μl
Optical path 1.3 - 1.4 mm cell volume ca. 55 μl
Optical path 2.3 - 2.4 mm cell volume ca. 70 μl
Maximum flow-rate 500 ml/min.
Internal diameter of inlet capillaries 1/16"
External diameter of inlet capillaries 1/8"
Used materials FEP, PEEK, fused silica
Casing dimensions Diameter of set up 38 mm; External casing diameter 18 mm
Weight 70 g


Preparative cell PLCC 13
Optical path 0.3 +/- 0.05 mm cell volume ca. 40 μl
Optical path 1.3 - 1.4 mm cell volume ca. 55 μl
Optical path 2.3 - 2.4 mm cell volume ca. 70 μl
Maximum flow-rate 500 ml/min.
Cell connecting capillaries with OD 1/8" and therad 1/4"-28
Used materials stainless steel, fused silica, PTFE
Weight 70 g

Preparative cell PLCC 14
Optical path 0.1 +/- 0.05 mm cell volume ca. 40 μl
Optical path 1.3 - 1.4 mm cell volume ca. 55 μl
Optical path 2.3 - 2.4 mm cell volume ca. 70 μl
Maximum flow-rate 500 ml/min.
Cell connecting capillaries with OD 1/8" or 1/16" and therad 1/4"-28
Used materials stainless steel, fused silica, PTFE
Weight 70 g
Dimensions 36 x 23 mm


Preparative cell PLCC 15
Optical path 0.3 +/- 0.05 mm cell volume ca. 40 μl
Optical path 1.3 - 1.4 mm cell volume ca. 55 μl
Optical path 2.3 - 2.4 mm cell volume ca. 70 μl
Maximum flow rate 500 ml/min.
Cell connecting capillaries with OD 1/8" or 1/16" and thread 1/4"-28
Used materials stainless steel, fused silica, PTFE
Weight 70 g

Preparative external cell PLCC 15 EX
The cell is assembled outside of detector and is connected with the unit by an optical fiber cable. Therefore it is used in explosion or contamination hazard applications. UV Detectors for this cell signal evaluation have to be assembled with SMA output and input connectors.
Technical parameters
Optical path / volume
0.3 ± 0.05 mm / 40 μl
1.3-1.4 mm / 55 μl
2.3-2.4 mm / 40 μl
Cell connection thread Ľ"-28; tubes OD 1/6" or 1/8"
Maximum flow rate 500 ml/min.
Wetted materials PTFE; fused quartz; stainless steel
Casing dimensions Diameter 36 mm; length 27 mm
Weight 150 g


PLCC 20 High Flow
The cell is assembled outside of detector and is connected with the unit by an optical fiber cable. Therefore it is used in explosion or contamination hazard applications. UV Detectors for this cell signal evaluation have to be assembled with SMA output and input connectors.
Technical parameters
Optical path - Basic continuously changeable 0.1 to 1.5 mm
Discontinuous changes of basic optical path +1 and +2 mm
Connecting thread of inlet nipple NPT 1/4"-18
Inlet ID 1/4"
Inlet OD 1/2"
Maximum flow rate 15 l/min by pressure 0.5 MPa
Materials of the cell PTFE, fused quartz, stainless steel

 

SEPARPASS

separpassSEPARPASS is a device which enable to use detector cells for preparative liquid chromatography together with analytic detectors. Often older analytic detectors are available, but due low flow rates and limited pressures on the cell can not be used (cells in prep chromatography have a much larger volumes and thus much greater flow rates are available even with low pressure drop).
SEPARPASS is a system, which allows the small amount of liquid to flow through the detector, while a large number of phase bypass the detector cell. An overpressure for detector is generated by a spring force. Pressure drop for the detector can be (in limited range) changed by a control knob.

The unit is just a metal block with four holes and rotating knob. Two holes are to enter and exit the mobile phase and two for input and output from the detector. Inside the block is a ball valve, which split the liquid flow and assure that the detector cell is always under the same (sufficiently low) pressure. All excess liquid flows around the detector directly to the fraction collector. The bypass eliminates any adjustment of the flow during separation - only on the beginning is set spring force by a rotating knob. The pressure on the detector cell can be set in the range 1 - 3 bar.

Four different magnitudes of the unit are available:
SEPARPASS 01 with fitting 1/16" on detector side and 1/8" on main flow side
SEPARPASS 02 with fitting 1/16" on detector side and 1/4" on main flow side
SEPARPASS 03 with fitting 1/8" on detector side and 1/2" on main flow side
SEPARPASS 04 with fitting 1/4" on detector side and 3/4" on main flow side