Chang In-Hyoung, Lee Chong-Geun, Lee Dong Soo
Department of Chemistry, Yonsei University, Seoul 120-749, Korea.
Anal Chem. 2003 Nov 15;75(22):6141-6. doi: 10.1021/ac0347314.
A method has been developed for the simultaneous determination of low molecular weight aliphatic amines and ammonia in the atmosphere. Analyte gases are collected quantitatively in high-purity deionized water of a planar diffusion scrubber, and the resultant solution is analyzed by ion chromatography. A 1-h cycle analysis could be continuously repeated. The calibrations for the amines are linear between 5 and 500 pptv. The detection limits are a few pptv with RSD of less than 3%. The calibration for ammonia shows severe curvature at high concentrations so that second-order fitting is required for accurate determination. This method was successfully applied to the environmental air analyses. The major amines in the atmosphere were trimethylamine, dimethylamine, and methylamine, and the temporal variations were closely correlated with that of ammonia, implying their identical emission sources.
已开发出一种同时测定大气中低分子量脂肪族胺和氨的方法。分析物气体通过平面扩散洗涤器定量收集到高纯度去离子水中，所得溶液用离子色谱法分析。1小时的循环分析可连续重复进行。胺类的校准在5至500 pptv之间呈线性。检测限为几pptv，相对标准偏差小于3%。氨的校准在高浓度时显示出严重的曲线关系，因此需要进行二阶拟合以进行准确测定。该方法已成功应用于环境空气分析。大气中的主要胺类是三甲胺、二甲胺和甲胺，其时间变化与氨的变化密切相关，这意味着它们有相同的排放源。
