UV detector LCD 2071.2
is small simple unit for use in analytical, preparative and FLASHliquid chromatography applications based on measurement of absorption of UV radiation of 254nm. The unit is easy for operating, reference and sample signal are available for detector diagnostics. Work hours of lamp are counted using build in counter.
There is possible to control the unit using keyboard, external logic signals or using RS 232. The output signal is recorded on build in recorder together with MARK signal from fraction collector and at the same time is it available in digital and analogue form on the output connector. The detector is equipped with an interference filter 254 nm to reduce the others spectral lines of mercury lamp.
Very interesting are the small dimensions of unit.
There is possible to use three type of cells:
- Preparative cell PLCC 11 with basic path length 0,1 mm
- Preparative cell PLCC 13 with basic path length 0,3 mm
- Analytical cell HPLC 08
Important notice: Output signal of the detector is directly proportional to the optical path of the cell. Since the optical paths of cells may be changed, noise and drift levels are referred to the optical path of 10 mm, corresponding to the AU definition.
Analytical cell HPLC 08
|Volume / optical path||10 µl / 5 mm|
|Diameters of capillaries OD x ID||input 1/16" x 0,2 mm; output 1/16" x 0,5 mm|
Preparative cell PLCC 11 /PLCC 13
|volume/optical path(adjustable)||45 µl / 0.1 mm, 55 µl (0,3mm by PLCC 13) / 1.4 mm, 70 µl / 2.4 mm|
|cell connecting||tubing with OD = 1/16" or 1/8" thread 1/4"-|
|Light source||low pressure mercury lamp Nk4/4|
|Time constant||1.0 sec.|
|Power supply||230 V ± 10%, 50 Hz or 115/100 V± 10%, 50-60 Hz|
|Power input||34 VA|
|Dimensions W x H x D||165 x 178 x 435 mm (6,50” x 7.0” x 17,12”)|
|Noise level at empty cell (254 nm, TC 1 s)||± 8 x 10-5 AU|
|Drift at empty cell (254 nm after 1 h)||8 x 10-4 AU/hr|
|Wavelength||190 - 360 nm|