| 摘要 |
A testing tube for absorbing nitrosoamines from the air, containing a sorbing agent with developed surface and L-ascorbic acid. It is characterised in that a sorbent with the grain size of 0.2-0.8 mm is used, e.g. silica gel, coated evenly with L-ascorbic acid in the amount of 4-12 percent by mass of the dry mass of the sorbing agent. At the side of the air inlet, there is a drying layer, which constitutes 8-12 percent of the total mass of the prepared sorbing agent and contains 10-20 percent of a drying substance, e.g. ahydrous sodium (VI) sulphate. |
