| United States Patent | 5,395,589 |
| Nacson | Mar. 7, 1995 |
| Inventors: | Nacson; Sabatino (Willowdale, CAX). |
| Assignee: | Scintrex Limited (Concord, CAX). |
| Appl. No.: | 224,143 |
| Filed: | Apr. 7, 1994 |
| Apr. 6, 1994 [CAX] | 2120682 |
| Intl. Cl.: | G01N 30/00; |
| U.S. Cl.: | 422/88.; 422/52.; |
| Field of Search: | 52;83;88;90;98 |
| 5,308,481 | May, 1994 | Stalling et al. | 210/198 .2 |
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Apparatus for preconcentrating trace amounts of organic vapors in a sample of air for subsequent detection, comprising a metallic substrate; a thin film of fullerenes deposited on the metallic substrate for adsorbing the organic vapors on the thin film of fullerenes, thereby preconcentrating the organic vapors; and apparatus for heating the metallic substrate to a predetermined optimum temperature for desorbing the vapors from the thin film of fullerenes to form desorbed organic vapors for subsequent detection.