Groupe de produits: Systèmes ICP

Varian Vista Pro

The following illustrations and descriptions refer to the instrument model and are drawn from brochures.

They do not represent the scope of delivery. Please refer to the text of the offer for the exact scope of delivery.

 Technical Specifications:

• Sample introduction
  • The axial sample introduction system features a glass cyclonic-action spraychamber with glass concentric nebulizer and one-piece quartz torch with an extended outer tube that excludes atmospheric gases.
• Torch
  • Geometry is optimized for high precision and sensitivity at low flows and low power. The radial sample introduction system is ideal for samples with high dissolved solids and free HF. It consists of a double-pass, Sturman-Masters spraychamber and v-groove nebulizer manufactured from inert, polymeric materials.
• Spraychamber wash-out
  • The sample introduction system is designed for rapid washout. Four orders (10,000 x) signal washout can be achieved for most elements in less than 45 seconds.
• Gas flow control
  • Nebulizer gas: choose from manual high precision pressure regulator or computer controlled Mass Flow Controller (MFC).
    • Nebulizer gas 0-1.3 L/min in 0.1 L/min increments (MFC)
    • Plasma gas 0-22.5 L/min in 1.5 L/min increments
    • Auxiliary gas 0-2.25 L/min in 0.75 L/min increments
• Peristaltic pump options
  • Choose from built-in 2 or 3 channel, 10 roller peristaltic pump under full PC control including Fast Pump™ facility to improve productivity. Fast Pump operates the pump at full speed during the defined sample uptake period to improve sample throughput. The 3 channel PC controlled peristaltic pump allows for addition of reagents or internal standards.
• Pumped drain
  • The peristaltic pump automatically drains the spraychamber outlet to waste.
• Echelle Polychromator
  • For reliability and stability, the thermostatted echelle spectrometer has no moving optical parts. The echelle polychromator has a focal length of 400 mm and is thermostatted to 35 °C. It features a CaF2 prism cross disperser and echelle grating (94.74 lines/mm) creating an echellogram of 70 orders projected onto the
    VistaChip CCD detector. The polychromator can be purged with either nitrogen or argon.

     

    • Standard purge 0.7 L/min
    • A boost purge of 3 L/min for sub 185 nm operation is PC controlled
• Blooming Protection
  • Instead of protecting pixels in segmented groups or arrays, Vista-PRO features anti-blooming protection on each of the 70 000 pixels. This enables the simultaneous measurement of trace level analytes in the presence of nearby overrange signals.
• Stray Light
  • Performance Stray light elimination via baffles and optical design to less than 2.0 ppm effective As signal at 193.696 nm from 10 000 ppm Ca.
• Signal Stability
  • Typically stable to less than 1% RSD over 20 hours without internal standardization or any form of drift correction.