The ASXpress plus Rapid Sample Introduction Accessory increases sample throughput for ICP-AES and ICP-MS analysis by reducing sample loading, signal stabilization and washout times. Using proven technology, the ASXpress plus combines a metal-free, 6-port injection valve and inert, high-speed vacuum pump to rapidly load the sample loop for introduction to the nebulizer. The design of the ASXpress plus facilitates quickly rinsing the sample loop while simultaneously injecting sample into the ICP-AES or ICP-MS nebulizer for analysis. The segmented stream washout technology effectively cleans liquid flow paths more completely and in less time. The result is additional time dedicated to sample analysis, more effective flow path rinse, and reduced time between samples. (See video below.)
Analysis with Typical Setup
A standard analysis system relies upon a single peristaltic pump to both deliver samples to the nebulizer, and rinse the sample flow path between sample deliveries.
Analysis with ASXpress plus Technology
The ASXpress plus utilizes a high speed vacuum pump in addition to the ICP/ICP-MS peristaltic pump. The 6-port valve allows the use of both pumps simultaneously, as is illustrated below, reducing total sample analysis time significantly.
Load Position
The vacuum pump rapidly fills the sample loop (green path), while the ICP-AES or ICP-MS peristaltic pump simultaneously transports carrier solution, keeping the plasma stable (red path).
Inject/Rinse Position
The loaded sample is then pushed into the nebulizer for analysis via the carrier solution flowing through the ICP-AES or ICP-MS peristaltic pump (red/green path). Simultaneously, the autosampler probe is moved to the rinse station and the uptake flow path is flushed with rinse solution via the vacuum pump.
