DETECTION AND IDENTIFICATION OF CHEMICAL SIGNATURES
Abstract
In the work on the detection and identification of human chemical signatures, experimental and computerized statistical techniques were first developed, tested, and standardized. The experimental techniques solved the problems of sample collection, recovery, injection into the gas chromatograph, calibration and characterization of signature components. The sample collections were based on the principle of equilibration and were performed by means of Apiezon L-coated Teflon powder in the form of a fluidized bed. The collected samples were transferred into a special injector needle by means of an IITRI-designed transfer system. The injection of samples into the gas chromatograph was performed in a timed, automatic and reproducible manner with a specially constructed injection system. The calibration method permitted correlation of the concentrations of known signature components in air with their respective peak areas. The sensitivity of this novel process is of the order of one part per billion (by volume) of an organic component in air.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 19, 1969
- Accession Number
- AD0691738
Entities
People
- A. Dravnieks
- B. K. Krotoszynski
Organizations
- IIT Research Institute