DETECTORS

LCD 2082.2 UV-Vis Detector
 

A spectrophotometric detector with continuously variable wavelengths in the range of 190 - 600 nm and a noise level ± 1.25 x 10-5 AU with an empty cell.  The detector may be used for ordinary analytical chromatography and chromatography on microcolumns as well as for preparative chromatography, according to the selected cell (see below).

Connecting capillaries may be led out either from a front or a side panels of the detector. An appropriate time constant may be selected according to the type of analysis. The detector is equipped with a high standard IST deuterium lamp in a special socket making possible an easy changing. A recorder and an integrator may be connected to the detector output. A HPLC 02 analytical cell is a part of the detector.

Specifications:

Ordering No. 3004

LCD 2082.1 UV Detector

A spectrophotometric detector with continuously variable wavelengths in the range of 190 - 360 nm. Other features are the same as those of the LCD 2082.2 detector.

Ordering No. 3003

Flow-cells for LCD 2082 detectors
 

Cells from the left:  ZK 01, MLCC 01,  HPLC 02,  PLCC 01 and  PLCC 02.

HPLC 02 Analytical Flow-cell:a standard part of the LCD 2082 detectors. Cell volume is 10 µl and its optical path is 5 mm. A hydrodynamic resistor is supplied with the cell to eliminate formation of bubbles.

Ordering No. 3100

PLCC 01 and PLCC 02 Preparative Flow-cells: They are designed for preparative analyses. PLCC 01 cell is equipped with inlet capillaries of stainless steel (1.5 mm O.D., 1.1 mm I.D.), and PLCC 02 cell is made of PTFE (3 mm O.D., 2 mm I.D.). Cell design makes possible to change the length of the optical path according to the particular conditions of the analysis (from about 0.3 mm to 2.4 mm).

MLCC 01 Microcell: a flow-cell with very small internal volume of 0.5 µl designed for microcolumn chromatography applications. The optical path is 0.8 mm long.

Ordering No. 3110

ZK01 Dummy cell: a cell without windows designed for verification of correct detector operation, lamp ageing, and checking for cleanness of a cell.

Ordering No. 3115

LCD 2083.1 UV Detector

A spectrophotometric detector with continuously variable wavelengths in the range of 190 - 360 nm. Other features are the same as those of the LCD 2083.2 detector.

Ordering No. 3010

LCD 2084.2 UV-Vis Detector
 

It is a processor version of a LCD 2082 detector with a wavelength range of 190 - 600 nm and a noise level ± 1.25 x 10-5 AU with an empty cell.   A wavelength change and sensitivity may be controlled by a programme during an analysis.  An informatory scan may be performed during analysis in a selected portion of a spectrum.

Thus obtained scan can be used for determination of an optimum wavelength for particular analysis, or for a check for purity of a peak.

The individual programmes may be stored in a detector memory. All operations may be also performed in a manual mode.

The detector performs automatic wavelength calibration after lamp has been switched on, and the switching off the lamp may also be pre-programmed after completion of analysis.

The detector cell is replaceable from the side of the detector. A standard cell, preparative cell, or microcell may be used according to the type of analysis.

The start can be initiated either from a keyboard or with a switch on an injection valve.

A detector output may be recorded using an integrator and a recorder.

Specifications:

Ordering No. 3006

LCD 2084.1 UV Detector

It is similar to a LCD 2084.2 detector with continuously variable wavelengths in the range of 190 - 360 nm.

Ordering No. 3005

Flow-cells for LCD 2083 and 2084 detectors
 

Cells from the left:  ZK 02, MLCC 02,  HPLC 04,  PLCC 04 and  PLCC 05.

HPLC 04 Analytical Flow-cell: a standard part of LCD 2084 detectors. Cell volume is 10 µl and its optical path is 5 mm. A hydrodynamic resistor is supplied with the cell to eliminate formation of bubbles.

Ordering No. 3102

PLCC 04 and PLCC 05 Preparative flow-cells: They are designed for preparative analyses. PLCC 04 cell is equipped with inlet capillaries of stainless steel (1.5 mm O.D., 1.1 mm I.D.), and PLCC 05 cell is made of PTFE (3 mm O.D., 2 mm I.D.). Cell design makes possible to change the length of the optical path according to the particular conditions of the analysis (from about 0.3 mm to 2.4 mm).

MLCC 02 Microcell: a flow-cell with very small internal volume of 0.5 µl designed for microcolumn chromatography applications. The optical path is 0.8 mm long.

Ordering No. 3111

ZK 02 Dummy cell: a cell without windows designed for verification of correct detector operation, lamp ageing, and checking for cleanness of a cell.

Ordering No. 3116

LCDF 2092 Fluorescence Detector
 

A detector with continuously variable wavelengths in the range of 190 - 600 nm both in excitation and emission region of the spectrum.  A change of wavelength controlled by a little motor makes possible to record a fluorescence spectrum.  The detector is equipped with a Hamamatsu flash xenon lamp with a low input and a long service life. Flash frequency is adjustable.

Used cell of Starna company is accessible form the side panel of the unit.

A detector output may be connected to an integrator and a recorder.

Interference of higher order spectra may be eliminated using optional optical filters.

Specifications:

Ordering No. 3040

RIDK 102 Refractometer

It is a detector utilising the dependence of refractive index on sample concentration in a mobile phase with a noise level ± 1 x 10^-7 RI. It is suitable especially when samples do not exhibit sufficient absorption in UV and VIS regions of spectrum (e.g. sacharides, alcohols, etc.), or mobile phase absorbs strongly in UV region (toluene, benzene, etc.).

Ordering No. 3008

AQUILON 510 Conductivity Detector
 

A conductivity detector suitable for analyses of anions and cations in particular. A suppressor enhancing system sensitivity 10 to 50 times is supplied with the detector to suppress conductivity of mobile phase.

Most important features of the detector are follows:

• - Easy operation of the unit
• - Easily accessible measuring cell with electrodes made of polished stainless steel of volume 5 to 20 µl
• - Precise thermostating of measuring cell 20, 30 and 40°C
• - Microprocessor control
• - Polarity, amplification and electronic baseline compensation is controled from a menu
• - AUTOZERO function for baseline setting
• - Visual and audible indications of overload conditions
• - Suppressor filled with 0,1 N H₂SO₄ to suppress conductivity of mobile phase

The example of analysis of anions in water:

• Column: DIONEX AS4A 4.6x250 mm
• Mobile phase: 1.7mmol Na₂CO₃/NaHCO₃
• Flow rate: 2 ml/min.
• Temperature: 30°C
• Injection loop volume: 20 µl
• 1. Clorides 10 ppm
• 2. Nitrates 10 ppm
• 3. Sulphates 10 ppm