Method of obtaining alcohol specimens and apparatus therefor
Abstract
Abstract A KNOWN QUANTITY OF DEEP LUNG AIR CONTAINING ALCOHOL IS DELIVERED FROM A HEATED CHAMBER THROUGH A NARROW INTRODUCTORY TUBE INTO A SEALED VIAL. THE CHAMBER IS HEATED TO PREVENT CONDENSATION OF THE ALCOHOL. THE SEALED VIAL CONTAINS A KNOWN VOLUME OF A SOLVENT FOR ALCOHOL AND A KNOWN CONCENTRATION OF INTERNAL STANDARD. AFTER A BREATH SAMPLE HAS BEEN PASSED THROUGH THE VIAL CONTENT THE HEATED CHAMBER IS DETACHED FROM THE INTRODUCTORY TUBE AND REPLACED BY A STYRINGE. THE SOLVENT AND THE TRAPPED ALCOHOL ARE MIXED THOROUGHLY IN THE SEALED VIAL AS A RESULT OF REPEATED WITHDRAWAL AND DELIVERY BY THE SYRINGE. THE SOLUTION THUS FORMED IN THE SEALED VIAL IS FINALLY TAKEN INTO THE SYRINGE AND DISPENSED AS ALIQUOTS INTO SMALL STORAGE VIALS FOR STORAGE AND SUBSEQUENT ANALYSIS.
Inventors
- 👤 A Bergh
- 👤 P Rodgers
Bibliographic Details
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