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

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％.

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

A capillary gas chromatographic method has been developed for determination of N,N-dimethylformamide in industrial waste air and waste water. An HP-INNOWAX column was employed. Quantitative analysis was carried out by means of hydrogen flame ionization detector (FID). The results indicated that the coexistence of acetone, ethanol and acetyl acetone had no interference with the test. Good linearity was obtained between the concentration range of 0.939 mg/L ~ 75.1 mg/L. The detection limits come to be 0.47 mg/L for industrial waste water, 0.16 mg/m3 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%.