毛细管柱气相色谱法测定工业废气和废水中N,N-二甲基甲酰胺

Determination of N,N-dimethylformamide in Industrial Waste Gas and Waste Water by Capillary Gas Chromatographic Method

采用HP-INNOWAX毛细管柱、气相色谱氢火焰离子化检测器测定工业废气和废水中的N,N-二甲基甲酰胺,可能共存的丙酮、乙醇和乙酰丙酮均对测试无干扰。方法在0.939 mg/L～75.1 mg/L范围内线性良好,对工业废水、无组织排放工业废气和有组织排放工业废气中N,N-二甲基甲酰胺的检出限分别为0.47 mg/L、0.16 mg/m3和0.31 mg/m3,标准溶液平行测定的RSD为1.9%～2.2%,废水样品加标回收率为94%～97%。

A capillary gas chromatographic method has been developed for determination of N,N-dimethyl- formamide in industrial waste air and waste water. An HP-INNOWAX column was employed. Quantitative analy- sis was carried out by means of hydrogen flame ionization detector （FID）. The results indicated that the coexis- tence of acetone, ethanol and acetyl acetone had no interference with the test. Good linearity was obtained be- tween the concentration range of 0.939 mg/L - 75.1 mg/L. The detection limits come to be 0.47 mg/L for in- dustrial waste water, 0. 16 mg/m^3 for out of control exhaust gas and 0. 31 mg/m3 for stationary source emission. RSD of standard solution parallel determination ranged from 1.9% to 2.2%. Spiked recoveries of waste water sample ranged from 94% to 97%.