固定污染源无组织排放二甲基甲酰胺的监测研究

STUDY ON MONITORING DMF IN UNSYSTEMATIC EMISSION IN FIXED SOURCE

对固定源无组织排放的二甲基甲酰胺的监测方法进行了探讨研究。利用已有车间空气中二甲基甲酰胺的检验方法,采用适当延长采样时间,改进色谱分析条件,使方法检测下限降低,以用于环境空气样品监测。当采样体积为50L时,最低检出浓度为0.01mg/m^3,可较好地满足环境影响评价工作需要;通过列举监测实例,分析如何选择适宜的监测条件,确保捕捉厂界最高浓度监测值,以获得满意的监测结果。

A monitoring method for DMF(N, N-dimethylformamide) in unsystematic emission in fixed source is studied in this paper. An available DMF determination method for air in workshop is improved by prolonging the sampling time and altering the GC conditions, getting a lower determination limit for ambient air monitoring; When the sampling volume is 50 L, 0.01 mg/m3 of DMF in air can be determined. It can meet the requirements of environmental assessment. An actual example is given and the conditions are discussed, including how to select feasible monitoring conditions in order to capture the maximum DMF concentration in factory boundary to obtain a satisfactory results.