TurboMatrix Headspace Sampler and HS 40/110 Trap User's Guide

Accessories

closure must be firmly crimped to the neck of the vial so that it cannot rotate freely, but it should not be deformed in any way.

6. If the vial is not sealed properly, remove the cap, using the cap removal tool (P/N N9301270) or the electronic hand decapper (P/N N9302595) and reseal the vial. If the vial still cannot be sealed properly, you may need to adjust the hand crimper. See Adjusting the Hand

Crimper on page 271 for more information.

Screw Top Sample Vials

If not properly secured and sealed, the screw cap vials may leak. In order to prevent this from occurring, please insure that the septa is seated securely in the cap prior to tightening. In addition, the vial cap should be securely screwed down, with the cap and vial threads properly aligned.

Accessories (Screw and Crimp Cap

Vials)

Unsafe high pressure formed in the vial during thermostatting may be due to the use of a solvent with a boiling point that is too low for the application. Operator error or inexperience may also contribute to unsafe thermostatting conditions. For example, if an aqueous sample is thermostatted to 80°C, the internal water vapor pressure is only 47 kPa. If, however, the sample is thermostatted at 180°C, the internal pressure would be as high as 10

3

kPa, with a high risk of vial explosion.

The internal pressure in the vial presses the septum disk against a star spring (crimp top only) and the aluminum cap, which has a small, curved slot. At pressures above 500 kPa, this slot is deformed and an artificial leak opens, venting the internal pressure to atmosphere. This safety closure requires flat septum disks and will not work with rubber stoppers.

1

1.

Bruno Kolb and Leslie S. Ettre, Static Headspace Gas

Chromatography, Theory and Practice, (New York, 1997 Perkinelmer

P/N N1011210), p. 51

178