The SIL-20AC is equipped with a sample cooler that has a built-in dehumidifier to minimize condensation problems. The samples can be kept at a fixed temperature between 4ºC and 40ºC. The temperature adjustment is quick and uniform, so that heat- or cold-sensitive components of the sample remain stable. Characteristics:. The adsorption of sample components was reduced to an absolute minimum. Improvements include:. Special needle treatment (patent pending) – hides active sites and minimizes ionic interactions. One-piece injection port/needle seal at valve center - eliminates sample transfer tubing. Redesigned needle seal to minimize surface area. Low adsorption valve materials. These advances together serve to eliminate cross-contamination - even with difficult basic and hydrophobic compounds. A two-solvent rinse is available for particularly difficult samples. High speed/throughput – 10 seconds for a 10 µL injection. Ultra-fast sample processing – 10 seconds for a 10 µL injection – is now possible with the SIL-20A/20AC. Use in combination with a high-speed separation column enables an analysis cycle time of less than a minute. Precise sample injection. Greater accuracy of the injection volume was achieved by integrating a high-performance, precise dosing pump. Injection volumes of less than 1 µL are possible and the direct injection method means valuable samples are never wasted. Optional rack changer. Significantly increases sample capacity. With increased speed, capacity becomes a limiting factor for unattended operation. The optional rack changer automatically loads microplates into the sample compartment of the SIL-20A/AC. The capacity of 12 plates ensures convenient processing of over 1000 samples. The "C" model of the changer has the same disk capacity and includes a 4ºC to 40ºC cooling function equivalent to that of the SIL-20AC. SIL-20AC:. Injection method:. Full volume sample injection, variable injection volume. Injection volume adjustment range:. 0.1 to 100 µL (standard), 1 to 2,000 µL (option). Number of samples processed:. 175 (1mL vials), 70 (1.5mL vials), 50 (4mL vials), two 96-well MTPs, two 384-well MTPs, additionally ten 1.5mL vials. Injection volume accuracy:. Maximum 1%. Injection volume precision:. RSD: maximum 0.3% (at 10 µL injection under specified conditions). Cross-contamination:. Maximum 0.005% (naphthalene, chlorhexidine). Number of repeated injections:. Maximum 30 per sample. Needle irrigation:. Freely adjustable before and after sample injection. Sample cooler:. Block cooling/heating, used together with dehumidification function, 4°C to 40°C. Operating pH range:. 1 – 14. Operating temperature range:. 4°C to 35°C. Dimensions, weight:. 260 (W) x 415 (H) x 500 (D) mm, 30 kg. Power requirements:. 100 VAC, 300 VA, 50/60 Hz Labprocure is responsible for this device.