Markelov HS9000
Various Static and Dynamic Modes of Sampling
The HS9000 utilizes a closed sample introduction system. Unlike syringe injection systems, the loss of headspace vapor during the injection process due to vapor pressure changes is never a concern. In addition to the sensitivity benefits of the Dynamic Headspace technology, the HS9000 delivers the added flexibility of performing traditional fixed loop injections and time-based injections incorporated within a single system. Whether your preference is to make a highly reproducible timed injection to minimize the number of sample pathway components, a known/fixed volume loop injection or a concentrated injection for improved sensitivity, the HS9000 is the right instrument for you.
- Static Loop Injection – A fixed volume loop available in various sizes is filled with the headspace vapor to inject a known volume of sample into the GC.
- Static Time-Based Injection (Pressure Balanced) – The headspace vapor is directed to the GC for a programmed period of time.
- Dynamic Headspace Trap Injection – The headspace vapor is continually displaced from the sample vial and collected on an adsorbent trap for a concentrated injection.
- Dynamic Headspace Time Injection – The headspace vapor is continually displaced from the sample vial and directed to the GC.
Patented Rotary Mixing Technique
The HS9000 utilizes a patented horizontal rotary evaporation mixing technique. This unique mixing mode places the sample vials in a nearly horizontal position to expose more condensed sample to the available headspace. Since the concentration in the headspace reflects only the surface concentration of the condensed sample, by horizontally rotating the vial more surface area is exposed for a faster and more efficient evaporation, which leads to shorter equilibration times and reduces the potential of thermal breakdown. Calculations show that by cutting the thickness of the sample in half, the equilibration time can be reduced by a factor of four. The user also has several mixing options including variable speed and an “Agitate” mode which only partially rotates the vial.