English translation: caps or lids used otherwise to close serum bottles
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GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
English term or phrase:
serum bottle closures
caps or lids used otherwise to close serum bottles
Connect the absorption bottles to the air outlets of the flasks.
If barium hydroxide is used, connect three absorption bottles, each containing 100 ml of 0,0125 M barium hydroxide solution, in series to each 5-litre flask. The solution must be free of precipitated sulphate and carbonate and its strength must be determined immediately before use. If sodium hydroxide is used, connect two traps, the second acting as a control to demonstrate that all the carbon dioxide was absorbed in the first. Absorption bottles fitted with **serum bottle closures** are suitable. Add 200 ml 0,05 M sodium hydroxide to each bottle, which is sufficient to absorb the total quantity of carbon dioxide evolved when the test chemical is completely degraded. The sodium hydroxide solution, even when freshly prepared, will contain traces of carbonates; this is corrected by deduction of the carbonate in the blank.
Explanation: This is a common term, not specific as a brand name. There are aluminum closures that seal rubber stoppers or plugs onto serum bottles (sometimes called serum vials). The link shows a picture of bottles and closures.