| 摘要 |
The device (2) consists in a closing body (3) with a roomy inner space (3') in the upper part thereof, and the lower cupling part thereof being provided with a tight pitch thread (7). The diameter (D) of the inner space (3') is greater than the diameter (d) of the lower part for the cupling with the test tube (1). A strongly compressable means (5) being highly absorbent and wrapped up in a thin piece of paper (4) is inserted in space (3') and soaks - once the test tube is placed upside down - with the whole liquid phase contained therein. Radioactive or infectious contaminations, due to direct contact or volatilization, for the operator or the ambient are excluded. |
