Gilmour I J, Holland R, Craig D B
Anesthesiology. 1975 Dec;43(6):674-6. doi: 10.1097/00000542-197512000-00014.
Interposition of activated carbon between a nitrogen analyzer needle valve and gas mixtures containing halothane, methoxyflurane, enflurane, or isoflurane eliminated the interfering effects of these agents, but added sampling delays. Placement of a carbon-filled Swinney adaptor in the sampling line between the needle valve and analyzer also eliminated the interference. Linearity of response (range 0 to 80 per cent N2) and sampling delay (40 msec) were unchanged. The 90 per cent fall time (step change 80 to 0 per cent N2) increased from 35 to 100 msec. This adaptation allows rapid analysis of nitrogen concentrations during general anesthesia.
在氮气分析仪针阀与含有氟烷、甲氧氟烷、恩氟烷或异氟烷的气体混合物之间插入活性炭可消除这些药剂的干扰作用，但会增加采样延迟。在针阀与分析仪之间的采样管线中放置一个填充碳的斯温尼接头也可消除干扰。响应线性（氮气浓度范围为0至80%）和采样延迟（40毫秒）未变。90%下降时间（氮气浓度从80%阶跃变化至0%）从35毫秒增加至100毫秒。这种改进方法可在全身麻醉期间快速分析氮气浓度。
