Autosampler #1 must have:
- A recirculating bath capable of keeping samples cooled to 6°C
- A full 100 position autosampler (90 soil), thatwill interface to any concentrator for maximum versatility
- Capability to work with dual concentrators. One Autosampler must be able to work with 2 concentrators (1 being a Velocity XPT concentrator) and feed 1 6890/5973 Agilent GC/MS - Separate needles used to process water and soil samples
- 3 internal standard addition valves and the valves must not have any moving or rotating parts that can be clogged or scored. They must also be fully programmable in 1 uL increments.
- 5 mL inert PEEK sample loop
- A built in a Minimizer Valve that removes soil side contamination by diverting a portion of the concentrators bake flow through the soil pathway and out the soil needle
- The capability to extract multiple 5 mL water samples from one vial without removing the needle from the vial
- Fiber optic sensors to confirm the pick-up of the soil vial and delivery of the soil processing station
- The capability to perform a system leak check through the concentrator
- A large 15 liter blank water bottle
- The capability to make sample dilutions
- The capability to extract 5mL from a water sample without picking up the vial and moving it
- The capability to adjust how far the needle goes down into the VOA vial before sampling a water for transfer to the sparge tube
Autosampler #2 must have:
- The plumbing required if we should ever need to install a recirculating bath capable of keeping samples cooled to 6°C
- A full 100 position autosampler (90 soil), that will interface to any concentrator for maximum versatility
- The capability to work with dual concentrators. One Autosampler must be able to work with 2 concentrators (1 being a Velocity XPT concentrator) and feed 1 6890/5973 Agilent GC/MS
- Separate needles used to process water and soil
Samples
- 3 internal standard addition valves and the valves must not have any moving or rotating parts that can be clogged or scored. They must also be fully programmable in 1 uL increments.
- 5 mL inert PEEK sample loop
- A built in a Minimizer Valve that removes soil side contamination by diverting a portion of the concentrators bake flow through the soil pathway and out the soil needle
- The capability to extract multiple 5 mL water samples from one vial without removing the needle from the vial
- Fiber optic sensors to confirm the pick-up of the soil vial and delivery of the soil processing station
- The capability to perform a system leak check through the concentrator
- A large 15 liter blank water bottle
- The capability to make sample dilutions
- The capability to extract 5mL from a water sample without picking up the vial and moving it
- The capability to adjust how far the needle goes down into the VOA vial before sampling a water for transfer to the sparge tube
Both concentrators must have:
- Electronic flow control for programmable flow rates and automated leak and flow check ability
- Moisture control during purge cycle to reduce sample desorption pathway and create a consistent moisture control parameter regardless of desorb flow rate or desorb time.
- Front mounted traps for easy access
- Superior chromatographic resolution
- Early head start signal during bake which tells autosampler to begin processing the next sample, shortening overall cycle time
- Ability to interface to any autosampler and GC, GC/MS
- Purge-side moisture control which removes dead volume on the desorption pathway
- Programmable temperature on the moisture condensate trap
- Desorb pressure control allowing the user to program in a pressure of the trap before desorption
- Desorption flow control allowing the user to control the flow across the trap independent of the GC split ratio
- Electrically actuated 8-port valve with a 45° rotation and a replaceable valve rotor (PEEK)
- On-Board Windows XPe Operating System
- 10 inch color VGA monitor
- 5-mL fritted sparge vessel
- SilcoSteel Tubing, 0.020 ID 60¿ Standard and Siltek Tubing and Siltek treated fittings throughout the sample pathway
- The capability to heat the sparge vessel during the bake cycle to reduce carryover
- Fiber optic-based foam/overfill sensor with adjustable sensitivity which can be programmed to stop or switch to needle sparge