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<br />Page 1 of 2 5/9/18 r1 <br />Using Disposable Syringes for TO-17 Sample Collection <br />Supplies: <br />· TO-17 Sorbent Tubes – Tubes are capped on each end with a Swagelok nut, pink ferrule and <br />cap. Each tube is wrapped in uncoated aluminum foil and shipped in a tin box with activated <br />charcoal granules. <br />· Syringe assembly – A 60 cc or 10 cc syringe is equipped with a 3-way valve and a tube holder. <br />· Optional: Swagelo k union and fitting to connect sorbent tube sample inlet to 1/4” tubing. <br />Leak Check Procedure: <br />1) Remove the Swagelok nut, cap, and ferrule from the outlet side of the sorbent tube. <br />2) Insert the sorbent tube into the tube holder on the syringe assembly. <br />3) Turn the valve so the ‘Off’ position is toward the valve vent, and make sure the Swagelok nut <br />and cap on the tube inlet is tight. <br />4) Pull the plunger of the syringe. <br />5) If the plunger does not move or immediately returns to the starting position, then the system is <br />leak-tight and ready for sampling . <br />6) Turn the ‘Off’ position toward the sorbent tube. <br />Sample Collection (See Figure 1 on page 2): <br />1) With the tube still in the tube holder, remove the cap from the inlet of the sorbent tube. <br />2) If collecting soil gas vapors from a ¼” tube, connect the Swagelok nut from the tube inlet to a <br />union. Connect the ¼” probe tubi ng to the union using a Swagelok nut and ferrule. Check that <br />this connection is secure by pulling on the sorbent tube and tubing. The sorbent tube and <br />tubing should not move. <br />3) Turn the valve so the ‘Off’ position is toward the valve vent and pull the plunger to the desired <br />volume. <br />4) If multiple aliquots are required, turn the valve so the ‘Off’ position is toward the sorbent tube <br />and push the plunger back to the starting position, emptying the contents through the vent <br />valve. Do not push the contents of the syringe through the sorbent tube. Repeat steps 3 and 4 <br />as necessary. <br />5) When desired volume has been collected, remove sorbent tube from the tube holder and re-cap <br />both ends using the original Swagelok nut, ferrule, and cap. <br />6) DO NOT OVERTIGHTEN THE SWAGELOK NUT. OVERTIGHTENING CAN CRIMP THE TUBE AND <br />PREVENT ANALYSIS. <br />7) Record the sample volume on the COC. <br />8) Re-wrap tubes in aluminum foil and ship back in the tins under ice. <br />9) Return the syringe assembly with the tubes.