| 摘要 |
A colorimetric test tube having a colorimetric indication which includes a simple detection system for testing gases dissolved in liquids. The test tube has an indicator for the colorimetric indication of gaseous substances to be detected and it has an opening covered against the environment to be tested with a hydrophobic membrane which is permeable to the substances whose presence is to be detected and which can be used for indicating the presence of gases dissolved in liquids. The membrane is advantageously sealed with a covering which dissolves upon immersion of the test tube in a liquid. |
