Other

Peter G Chaconas

Peter E Rising

An evacuated vial for collecting a fluid sample and a method for manufacturing the vial comprising a cylindrical glass tube, one end of the tube formed into a frangible tip, a glass bottom closing off the other end of the tube, and a depression formed in the bottom forming an internal breaking tip extending into said tube. The bottom of the tube is sealed in a manner permitting convenient puncture thereof to break the tip when a sample is to be delivered.

Evacuated sampling vial

A sealed indicator vial to detect the presence of a predetermined contaminant in water containing a mixture of reagents reactive in the presence of water, the mixture being sufficiently dehydrated to prevent the reaction of said reagents while sealed in said vial. The vial contains an inert atmosphere at less than atmospheric pressure. Also described is the method of producing such an indicator vial in which a tube containing the dehydrated reagents is heated and stretched to form a narrow waist while under vacuum.

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Rockville, MD, United States of America

Peter G Chaconas