Dissolved oxygen can cause flow rate instability and increased baseline noise. Also, it has a quenching effect on fluorescence detection and increases the background of UV detectors. Dissolved gases can be released in the LC system, forming bubbles in check valves, at connections, or in detector flow cells.

In-line vacuum degassing is more effective at removing dissolved gas from mobile phases than sonication or helium sparging. In-line degassers work by drawing gas across a gas-permeable membrane encased in a sealed chamber. Traditionally, the membrane has been made of PTFE tubing, but the DEGASi PLUS degasser uses a highly permeable Systec AF membrane that is more gas permeable than PTFE. This translates into a 480 μL chamber volume for quick start-up and equilibration.

The DEGASi PLUS degasser employs the Systec ZHCR stepper-driven motor vacuum pump. Zero Hysteresis Constant Run (ZHCR) maintains a constant vacuum that is unaffected by varying degassing loads. This patented control strategy eliminates baseline fluctuation caused by dissolved gases and air.

Compatible with most HPLC solvents and buffers except hexafluoroisopropanol, hexanes (60% n-hexane), sodium azide, hydrofluoro and perfluorinated solvents, and fluorocarbons. Concentrated acids and bases, particularly 1 molar or greater, may attack PEEK and PPS wetted parts. Also, mobile phases with high concentrations of buffers and salts should not be left in an idle instrument. Flush system prior to shutdown to avoid crystallization. Contact Technical Service or your local Restek representative if additional information is needed.

Specifications
Channels: 4
Optimum flow rate: 3 mL/min/channel
Maximum flow rate: 4 mL/min/channel
Liquid connection: 1/4"-28 UNF threaded flat-bottom port
Max pressure: 70 psi
Pressure loss: 0.24 psi (1.65 kPa)
Internal volume: 480 μL
Wetted parts: Systec AF, PEEK, Glass-filled PTFE
Size (L x W x H): 245 x 111 x 59 mm
Power requirements: 110 to 240 VAC (±10 %), 1 A, 50 to 60 Hz (±3 Hz)
Wall sockets: 4 supplied with AC Adaptor, interchangeable: North America, Japan, UK, Continental Europe, Australia
Warranty: One year under normal conditions and with compatible solvents.

特点与优势

Ultra-high degassing efficiency in a small, durable unit.

• ZHCR patented control (variable RPM) maintains constant vacuum to eliminate baseline fluctuations.
• Systec AF membrane is highly gas permeable, allowing a small 480 μL chamber volume for fast start-up and equilibration.
• Flow path is biocompatible and offers broad chemical compatibility.
• Continuous vacuum system monitoring to ensure optimum operational conditions are maintained.
• Advanced error and leak-checking functions (refer to instruction manual).
• Use with any HPLC system.
• CE & RoHS compliant.

产品规格

货号.	25839
产品名	DEGASi PLUS流动相脱气机，110–240 V
单位	单个
Restek 类似货号	25796, 25194