The Entech 7650-L20 is the only system handling automated injection of Tedlar bags and other gas phase samples using a single inlet robotic autosampler. The 7650-L20 can automate the analysis of up to 16 Tedlar bags, or 24 to 80 BottleVac samplers or MiniCans depending on the size of the canister or Bottles. Canisters and gas sampling Bottle-Vacs can be heated prior to analysis to extend the molecular weight range of recoverable compounds, allowing a reliable way of measuring heavy volatiles or semi-volatiles. The dual loop system simultaneously injects an Internal standard along with the sample or calibration standard to support internal standard calibration methods. A 100% Silonite coated ceramic pathway ensures recovery of difficult compounds, creating the most comprehensive technique available for the quantitative measurement of organic compounds in gas phase samples. The 7650-L20 can automate the injection of gas samples to virtually all GCs by using the model specific communication cables available from Entech.
All other systems for the analysis of Tedlar bags use a rotary valve and individual lines that can suffer from contamination and carryover due to long exposure times, dead volume in connective fittings, and plastic rotors in the rotary valves. The 7650-L20 uses a single inlet that makes only momentary contact with the sample when drawing a sample through a calibrated loop for injection into a GC. This line is then immediately flushed to minimize exposure times. The unique inlet allows a 1/16” ceramic coated stainless steel tube to be inserted right into the sample fitting, called a Micro QT valve, that is heated right up the point of sample contact. By inserting the 1/16” continuous tubing right into the sample valve on the Tedlar bag, MiniCan, or Bottle-Vac, all dead volume and cold spots are eliminated. This ensures a clean, contamination free solution well into the semi-volatiles range. Entech has perfected this technology over the past 15 years, and no other system on the market has been designed with these capabilities.
The Entech 7650-L20 is the only system handling automated injection of gas phase samples using a single inlet robotic autosampler. The 7650-L20 can automate the analysis of up to 16 Tedlar bags, or 24 to 80 Bottle-Vac samplers or MiniCans depending on the size of the canister or Bottles.