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Article No.: AAA00AA
Articlename: Autosampler AS 6.1

Fast and versatile analytical HPLC autosampler


Three different injection modes for high-precision and fast injection

The Autosampler AS 6.1L can inject from up to 768 positions when equipped with microtiter plates (either high or low formats) or from up to 108 standard 2 ml sample vials. Sample carryover is significantly minimized thanks to a highly-effective interior and exterior needle wash procedure. This autosampler is also fast and flexible: one complete sample injection cycle takes less than one minute, including needle wash. Three different injection modes are supported; “full loop filling” (highest precision and reproducibility), “partial loop filling” (variable volumes, e.g. for dilution series) and “µl pickup” (loss-free injection of extremely small sample volumes), allowing the user to optimize sample usage. The headspace pressure function prevents bubbles from forming in the vial during sample uptake. Precolumn derivatization is supported. For high-pressure injections of up to 700 bar, the autosampler is equipped with a so-called ILD™ valve (Intermediate Loop Decompression). This valve consists of a rotor-stator combination and includes a central port for depressurizing. For high pressure applications, the sample loop is depressurized prior to receiving the sample. This way, the sample is not diluted with solvent. Because the valve is switched extremely fast, pressure spikes are reduced. Analyses are more precise and wear of the column is reduced.

Technical Data

Order details

KNAUER product name Autosampler AS 6.1L

Sample injection

Autosampler Flow Path Analytical
Maximum back pressure 700 bar
Vial/plate dimensions max. plate/vial height: 47 mm (incl. septa or capmat)
Injection volume range 0.1 µl - 10 ml depending on sample loop
Sample loop 100 µl
Dispenser syringe 250 µl
Headspace pressure built-in compressore, only for sample vials with septum
Switching time inj. valve < 100 ms
Piercing needle precision ± 0.6 mm
Sample tray cooling none
Vial detection missing vial/well plate detection by sensor
Needle wash programmable: wash between injections and wash between vials
Wetted materials

Tefzel® (ETFE), Glass, Teflon® (PTFE), Kel-F® (PCTFE), stainless steel, PEEK, Vespel

Analytical performance

Injection modes full loop filling, partial loop filling and microliter pickup; PASA™ (pressure-assisted sample aspiration)
Injection precision RSD (Relative Standard Deviation):full loop injection: <0.3%partial loop injection at injection volume>5 µl: <0.5%microliter pickup injection at an injection volume>5 µl: <1.0%
Sample carryover < 0,01 % under typical conditions using needle wash; < 0.005 % under special conditions with extended needle wash
Injections per vial max. 9 injections
Injection cycle time minimum 7 s from the same vial, 14 s from different vials;< 60 s for>100 µl sample injection in all injection modes, incl. 300 µl needle wash
Analysis time max. 9 h, 59 min, 59 s

Communication

Inputs 2 programmable TTL inputs (next injection, freeze, stop)
Outputs 1 programmable relay output (inject marker, auxiliary, alarm)
Control Ethernet (LAN)
Interfaces LAN, analog

Technical parameters

Ambient conditions temperature range: 10–40 °C; 50–104 °F air humidity: 20 - 80%

General

Power supply 95–240 V AC
Dimensions 377 x 300 x 510 mm (W x H x D)
Weight 30 kg

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Technical data are subject to change without notice.
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