Analysis of volatile organic compounds
US4003257A · kind A · utility
Inventors
Key dates
| Filing date | Mar 12, 1974 |
| Grant date | Jan 18, 1977 |
| Priority date | — |
| Expiry date | Mar 12, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/255
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
System and method for reproducibly analyzing, both qualitatively and quantitatively, trace amounts of a large number of organic volatiles existing in a gas sample. Applications include (1) analyzing the headspace gas of body fluids and comparing a profile of the oganic volatiles with standard profiles for the detection and monitoring of disease, (2) analyzing the headspace gas of foods and beverages and comparing a profile of the organic volatiles with standard profiles so that flavor and aroma can be monitored and controlled, and (3) similar analysis for determining the organic pollutants in samples of water and air. The system includes a novel means (sample trap) for capturing and enriching the organic volatiles, a novel injector port for directly injecting the entrapped organic volatiles to a cryogenic percolumn to provide a sharply defined plug, and a novel capillary separating column. Various detectors may be utilized to identify the separated volatiles. The sample trap contains a solid adsorbent having the following properties: (1) high affinity for volatile organic compounds, (2) hydrophobic, (3) temperature stability up to 400.degree. C, (4) good desorption capability and (…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.