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Instrument Database:
Alcott Chromatography Inc. - 708AL Positive Displacement Autosampler
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| Year of introduction |
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| Status |
available |
| Company |
Alcott Chromatography Inc.
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| Categories |
Automation: Autosampler (LC)
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The Alcott Model 708AL Positive Displacement Autosampler is an automatic sampling and fixed volume injection system. The 708AL requires no accessory gases or syringes and, while using Alcotts' patented FilterCapTM, will automatically filter your sample "In-The-Vial". The 708AL can be equipped with or without an injection valve to allow for optimum configuration for existing or newly designed systems. OPERATION The benefits of the Positive Displacement technique are many, including viscosity independence in sample transfer from vial to valve's loop, the highest injection precision possible and simplicity of operation. The technique, as demonstrated below, is such that a uniquely designed cap is pressed into an Alcott CertifiedTM 8mm vial which contains sample. Sample is then transferred to the injection valve by the piston action of the hollow autosampler needle which first penetrates the vial cap, then uses the cap to displace the vial's contents.
BENEFITS - 128 position sample vial tray
- Integrated high speed injection valve
- Selectable needle depth (4 positions)
- "On-the-fly" programming and editing of methods
- System interface through RS-232, IEEE, Contact Closures and BCD connectors
- Automatically filters sample "In-The-Vial"
- Simple to use and maintain
- Thermoelectric refrigeration option controls sample temperature from 4° C to 40° C
- Customized software features available
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| Specifications |
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| Standard | | Design Type: | Fixed loop, XYZ movement, Positive Displacement | | Tray Capacities: | 128 (8mm) sample vials | | Injections Range: | 0.06µL to 200µL | | Injections Per Vial: | Up to 4 with loop size < 10µL | | Precision: | Less than or equal to ±0.3% RSD, ACI test conditions | | Carryover: | Less than 0.25% without rinse
Less than 0.004% with rinse, under ACI test conditions | | Keypad: | 20 key, 4 line, 80 character LCD | | Valve: | Valco Cheminert C3 valve with 10µL loop and high speed actuator | | Programming: | 10 Methods, maximum 128 steps per method. Priority sampling | | Communications: | Interfaces: RS-232-C, IEEE, I2C
Outputs: BCD, parallel printer port, inject market, 4 user selectable NO or NC Contact Closures with user selectable closure duration times. | | Dimensions: | 33 cm H x 32 cm W x 55 cm D (13" x 13" x 21")
Weight: 14 Kg (31 lbs.)
Weight: 17 Kg (38 lbs.) Refrigerated | | Wetted Materials: | Teflon, 316 stainless steel and nitronic 60 | | Voltage: | Autoselectable: 100-240 VAC ±10%, 47-63 Hz | | Options | | Valves: | C2, C4 or CI4W internal loop and C6 external loop Valves available | | Refrigeration: | 4° C to 40° C within ±1° C accuracy using Peltier cooling of entire tray surface | | FilterCaps: | 5.0 µm, 0.45 µm and 0.2 µm polypropylene filter membranes available | | Materials: | Biocompatible materials available | | Other: | Valveless models available for FIA and other direct injection applications | | Accessories | | AutoChanger 31: | High Throughput vial tray changer that integrates with the Model 708AL autosampler to allow unattended sampling for up to 11 trays. | | Column Switcher: | Column compartment designed to hold up to 6 columns. User selectable six position Valco valve can be controlled either manually or via RS-232 connection. Standard and heated versions available | | Printer: | Small footprint thermal printer for recording autosampler methods. | | Product Part Number | | 709/00000/01 | Standard Model 708AL with Cheminert C3 Valve with Fixed 10ul loop | | 709/00000/60 | Standard Model 708AL without Valve or actuator. This unit will accept the Model 732 Rheodyne actuated valve | | 709/00000/01R | Refrigerated Model 708AL with C3 Valve with Fixed 10ul loop | | 709/00000/60R | Refrigerated Model 708AL without Valve or actuator. This unit will accept the Model 732 Rheodyne actuated valve | | 708/25921/00 | Optional UV Cover (recommended to be purchased with autosampler) |
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