Leírás és Paraméterek
Flash 14 DAD 400 is an UV diode array detector (DAD,PDA), that allows measuring absorbance on four wavelengths simultaneously in one cell just as measuring of whole spectrum (scan). This unit is used in liquid chromatography for verification of analyzed samples by means of four wavelengths or in situations, when some peaks absorb on different wavelengths. It is possible to use the detector in flash and preparative applications.
The unit is designed as standalone with 90-264 V power supply and RS232 controlling.
The DAD detector design offers many advantages, such as:
- Continuous 5 Hz scan or absorbance measuring on four wavelengths simultaneously
- Wavelength setting from 200 up to 400 nm in increments of 1nm
- Lamp work hours are counted using a built-in counter
- Lamp is easy exchangeble from detector front panel
- Clarity PDA module support for 3D measuring
- Powering 90–264 V
- Unit is controlled through RS232 interface
Technical parameters:
| Wavelength range (four wavelengths simultaneously | 200 - 400 nm (256 elements on CCD) |
| Scan | 200 - 400 nm, 5 Hz, step 1 nm |
| Typical spectral half-width | 8 nm |
| Accuracy of adjustment | ± 1 nm |
| Reproducibility | ± 0.5 nm |
| Light source | Deuterium discharge lamp |
| Noise level at test cell (254 nm, TC 0.75 s) | ± 5 x 10-5 AU |
| Drift at test cell (254 nm after 1 h) | 1 x 10-3 AU/hod |
| Materials in contact with mobile phase | PTFE; fused silica, stainless steel |
| Time constant (T90) | 0,5 s; 0,75 s; 1 s nebo 2 s (T63 0,3s;0,4s;0,6s;1s) |
| Output for integrator | 1 V/AU (in digital form only) |
| Interface | RS 232 |
| Power supply | 90–264 V |
| Power input | 90 VA |
| Dimensions (W x H x D) | 280 x 130 x 463 mm (11.02 x 5.12 x 18.23 in) |
| Weight | 9.0 kg (19.84lb) |
Preparative cell PLCC 15 (supplied with unit, in special holder):
| Volume / optical path (adjustable) | 45 µl / 0.3 mm 55 µl / 1.4 mm 70 µl / 2.4 mm |
| Cell connecting | tubing with OD = 1/8", thread 1/4"-28 |
| Maxiimal flow rate | 500 ml/min. |
