论文部分内容阅读
研究了三甲胺的测定方法和采样方法 ,用碱处理色谱柱及固体吸附剂 ,减少吸附 ,是本方法的特点。本法对三甲胺的检测限为 6 35 μg/ml;测定精密度用相对标准偏差表示为 4 5 9%～ 6 14% ;解吸效率为 93 9%～ 97 4% ;样品可在 10℃冰箱中保存 7天 ,解吸效率大于 90 %以上 ;当浓度为 140～2 2 3mg/m3时 ,采样效率大于 96 % ;2 0 0mg硅胶穿透容量为 2 38mg;应用本方法测定空气中三甲胺 ,灵敏度高 ,重现性好 ,简便易行 ,本研究符合监测规范化方法要求
The method of trimethylamine determination and the sampling method are studied. It is the characteristic of this method to treat the column and the solid adsorbent with alkali to reduce the adsorption. The limit of detection of trimethylamine in this method is 6 35 μg / ml; the relative standard deviation of determination precision is 459% -614%; desorption efficiency is 93 9% -97 4%; the sample can be stored in 10 ℃ refrigerator In the preservation of 7 days, the desorption efficiency is greater than 90%; when the concentration of 140 ~ 22 3mg / m3, the sampling efficiency is greater than 96%; 20000mg silica gel penetration capacity of 238mg; application of this method for determination of air trimethylamine, High sensitivity, good reproducibility, simple and easy to operate, this study is in line with the requirements of monitoring standardized methods