Nishikawa Y, Taguchi K
J Chromatogr. 1987 Jun 19;396:251-9. doi: 10.1016/s0021-9673(01)94062-2.
Nitrogen dioxide (NO2) and sulphur dioxide (SO2) in air were sampled by the use of a Sep-Pak C18 cartridge impregnated with triethanolamine-potassium hydroxide. The trapped NO2 and SO2 were eluted with a 8 mM sodium carbonate-3 mM sodium hydrogencarbonate solution and simultaneously determined by ion chromatography. In the active sampling mode, NO2 was determined with 5.2% relative standard deviation at 95 ppb and SO2 was determined with 2.4-5.3% relative standard deviation at 54-184 ppb. The recoveries were 85-98% for NO2 and 91-105% for SO2. In the passive sampling mode, the average concentrations of NO2 and SO2 were determined with 2.4-6.8 and 2.8-7.9% relative standard deviation, respectively, at atmospheric levels for 6-24 days.
使用浸渍有三乙醇胺 - 氢氧化钾的Sep - Pak C18柱对空气中的二氧化氮（NO₂）和二氧化硫（SO₂）进行采样。捕获的NO₂和SO₂用8 mM碳酸钠 - 3 mM碳酸氢钠溶液洗脱，并通过离子色谱法同时测定。在主动采样模式下，95 ppb的NO₂测定的相对标准偏差为5.2%，54 - 184 ppb的SO₂测定的相对标准偏差为2.4 - 5.3%。NO₂的回收率为85 - 98%，SO₂的回收率为91 - 105%。在被动采样模式下，在6 - 24天的大气水平下，NO₂和SO₂的平均浓度测定的相对标准偏差分别为2.4 - 6.8%和2.8 - 7.9%。
