The Agilent 1260 Infinity G4303A supercritical fluid chromatography autosampler has been converted to a fixed loop injector containing a 5 μL sample loop. The injection loop of the autosampler is installed between two ports of the 2 position/ 6 port injection valve. The total delay volume of the injector is about 3.3 μL. As with any fixed loop injector, overfill of sample is necessary to inject 5 μL reproducibly. To completely fill the sample loop, an excess of sample is required. This is about 3 loop volumes (15 μL of the installed loop) of sample to achieve 95 % of the maximum loop volume. For smaller injection volumes, the loop needs to be partially filled by sandwiching the sample between two air bubbles, one on either side, followed by a plug of modifier or other solvent behind the sample. Default methods for full loop filling are provided, and should be used as initial injection conditions. The default methods are automatically loaded in ChemStation.
S/N: DEAAB00161
Specifications:
| Type | Specifications |
|---|---|
| Number of samples | 100 x 2 mL vials, 30 x 6 mL vials |
| Injection volume | 5 μL for full loop injections (5 μL loop as default) larger loops possible (10 μL, 20 μL), partial loop filling for smaller injection volumes |
| Injection principle | Fixed loop |
| Injection precision | <0.3 % RSD for 5 μL |
| Sample temperature control | 4 – 40 °C with sample thermostat |
| Sample carryover | 0.05 % |
