Apparatus and method for dispensing high purity materials

A method for storing and dispensing a material from a pressurized container while maintaining the integrity or purity of the material to be dispensed, the method comprising:

• a) providing a pressurized container holding the material to be dispensed, the pressurized container having a dispensing valve with a dispensing valve stem having a distal end protruding from the pressurized container and a proximal end extending into the pressurized container;
• b) providing a syringe provided with 1) an on/off locking member for permitting/or preventing flow of the material into or out of a chamber of the syringe and 2) a stem having an end extending from the syringe for receiving material from the pressurized container;
• and
• c) providing a removable adaptor for connecting the distal end of the dispensing valve stem protruding from the pressurized container to the end of the stem extending from the syringe so as to establish a permissible flow path from one stem to the other stem;
• d) connecting the adaptor to the distal end of the dispensing valve stem protruding from the pressurized container to the end of the stem extending from the syringe;
• and
• e) activating the on/off locking member to the on position for permitting flow of material into the syringe;
• f) activating the dispensing valve to a dispensing mode permitting material to flow from the pressurized container to the chamber of the syringe;
• and
• g) activating the on/off locking member to the off position to isolate the material in the chamber of the syringe.