noun
open tube test
Technical term in chemistry or materials science for a test conducted in an open tube, often involving heating a sample in an open glass tube to observe decomposition or reaction.
開管分析は、試料を加熱したときの変化を観察するために用いられる。
The open tube test is used to observe changes when a sample is heated.
Compound of 開管 (open tube) and 分析 (analysis). The exact historical derivation is uncertain; the term is a technical calque or borrowing from Western chemistry terminology.