1. Manual or automatic cleaning Glass and plastic laboratory equipment can be cleaned manually using soaking or using laboratory cleaning equipment. Laboratory equipment should be cleaned immediately after use – a weak alkaline detergent can be used for simple soaking at low temperatures. Appliances that come into contact with infectious materials should be autoclaved as needed after cleaning. This is a method of preventing the sticking of chemicals so that the adhesion of chemical residues damages the bottle-top dispenser of the test apparatus.
Note: Be careful to disinfect the test equipment carefully before cleaning, if there is a risk of injury during the cleaning process.
2. Gentle washing For gentle handling of the bottle-top dispenser, it should be cleaned immediately after use — using low temperature, short soaking times and weakly alkaline detergents. Glass volumetric devices should not be soaked in alkaline solutions above 70 °C for extended periods of time as this can result in volume changes and scale damage due to glass erosion.
3. Useful information At 70 °C, 1N NaOH will erode approximately 0.14 μm glass for 1 hour. At 100 °C, this value becomes 1.4 μm, which is a tenfold increase. Therefore cleaning above 70 °C should be avoided and weak alkaline detergents should be used as much as possible.