TOPAZ Dual UV Detector
TOPAZ Dual UV Detector
is a new type of UV detector, which allows measuring absorbance of two wavelengths simultaneously in one cell. This unit is used in liquid chromatography to verify analyzed samples by means of a second wavelength or in situations when some peaks absorb on different wavelengths. It is possible to use the detector in analytical, preparative or flash applications by using different cells. Noise level at 254 nm is ± 1 x 10-4 AU with an empty cell.
The unit’s DAD (diode array detector) design offers many advantages:
- A wavelength setting may be changed in steps of 1nm
- The unit is easy for operating, reference and sample signal are available for detector diagnostics
- Output signal is it available in digital and analogue form on the output connector
- Work hours of lamp are counted using build in counter.
- Detector cell is easy replaceable from the side of the detector
Specification
| Wavelength range | 200 - 320 nm |
| Spectral half-width | 8 nm |
| Accuracy of adjustment | ± 1 nm |
| Reproducibility | ± 0.5 nm |
| Light source | Deuterium discharge lamp |
| Noise level at empty cell (240 nm, TC 1 s) | ± 1 x 10-4 AU |
| Drift at empty cell (240 nm after 1 h) | 5 x 10-4 AU/hr |
| Materials in contact with mobile phase | PTFE; fused silica, stainless steel, Vespel, PEEK |
| Time constant | 1 s |
| Output for integrator | 1 V/AU |
| Interface | RS 232 |
| Power supply | 230 V ± 10%, 50 Hz , 115/100 V± 10%, 50-60 Hz |
| Power input | 75 VA |
| Dimensions (W x H x D) | 220 x 178 x 435 mm |
| Weight | 12 kg |
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.
Used cells
Preparative cell PLCC 14 (supplied with unit)
| volume/optical path(adjustable) | 45 µl / 0.1 mm, 55 µl / 1.4 mm, 70 µl / 2.4 mm |
| connecting | tubing with OD = 1/16" and 1/8", thread 1“-28 |
Analytical cell HPLC 08 (optionally)
| 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 |
