Hitachi Medical Systems - L-2490
Manufactured by Hitachi Medical Systems
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L-2490 Refractive Index
Refractive index detection offers a solution in those cases where other detectors, such as UV, do not respond adequately to the compound of interest or where other detectors are not compatible with the mobile phase. Typical applications include sugars, alcohols, aliphatic hydrocarbons, polymers, and silicon oils.
The LaChrom Elite® L-2490 Refractive Index (RI) Detector features high sensitivity, excellent baseline stability, and compatibility with other LaChrom Elite® HPLC modules for unattended operation. The L-2490 provides digitalized signal output, shorter time for baseline stability, and variable cell temperature settings.
The LaChrom Elite® L-2490 Refractive Index (RI) Detector features high sensitivity, excellent baseline stability, and compatibility with other LaChrom Elite® HPLC modules for unattended operation. The L-2490 provides digitalized signal output, shorter time for baseline stability, and variable cell temperature settings.
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Features of L-2490
- Proven Differential RI Design - The L-2490 compares the refractive index (RI) of a sample in the mobile phase to pure mobile phase in a reference cell. This differential measurement method provides excellent sensitivity and compensates for flow cell contamination and fluctuating source energy. The cell temperature is settable in a range of 30 degree C to 50 degree C or to no control.
- Automation Features - For optimum results it is necessary to periodically purge the reference cell with fresh mobile phase. The L-2490 purge function is controllable from external contact closures for routine purge operations. Baseline auto-zero is also externally controllable.
- Part of the LaChrom Elite System - The 2490 is stackable forming an integrated, 14-inch wide HPLC system with other LaChrom Elite® modules. Empower™ 2 Software accepts data from the L-2490 through a USB interface which also provides for control of other system components like the L-2100 Pump, L-2200 Autosampler, and L-2300 Column Oven.
General Specifications
| Auto-Zero | 1 Full auto zero (optics + calculation) |
| Depth | 15.75 in |
| Height | 6 in |
| Temperature Range | 30 to 50 °C |
| Width | 13.5 in |
| Noise | 2.5 nRIU (water filled in, time constant 3.0 s) |
| Power Requirements | 100 to 240 VAC (+/- 10%), 50/60 Hz |
| Peak Power | 150 VA |
| RI Linearity | 600000 nRIU |
| Weight | 29 lbs |
Additional Specifications
Method of Detection: Deflection
Light source: Tungsten lamp
Refractive index range: 1.0 to 1.75
Time constants: 0.1, 0.25, 0.5, 1, 1.5, 2, 3, 6 s
External outputs: Warning when measurement range is exceeded, Auto zero, Alarm, Recorder 10 mV/FS, Integrator 1 V/FS
External inputs: Auto zero, Marker, Purge
Baseline adjustment range: 0 to 50% /FS
Recorder range: 0.25 to 512 x 10-6 RIU/FS
Cell volume: 8 ΜL
Max. flow rate: 10 mL/min
Max. pressure in cell: 7.1 psi (0.049 MPa)