高效液相色谱法测定N,N-二甲基甲酰胺及其在废水处理过程的中控分析

Determination of DMF With High Performance Liquid Chromatography Applied in Middle-Controlled Analysis of Wastewater Treatment

建立了废水的萃余水相及回收后N,N-二甲基甲酰胺的高效液相色谱检测方法.采用Krornasil-C18色谱柱分离,流动相为甲醇和水(体积比15∶85),紫外检测波长为205 nm.结果表明:DMF的浓度在3.06～38.28 mg/L时与色谱峰面积之间线性关系良好(r=0.999 7),相对标准偏差为1.03%,加标回收率为99.86%～101.09%.该方法简便快速,结果准确,重现性好,可为废水中N,N-二甲基甲酰胺的定量分析及回收提供较好的中控分析方法.

A method for DMF in waste water and organic phase with high performance liquid chromatography(HPLC) was established.HPLC was performed on a Krornasil-C18 column,using methanol and water(15∶85) as mobile phase and the detection wavelength of 205nm.The results show that the calibration curve is linear in the range of 3.06mg/L-38.28mg/L for concentration of DMF(r=0.9997),precision is high,and its relative standard deviation is 1.03%.The recovery DMF is between 99.86%-101.09%.The method is rapid,accurate,reproducible and can be used for quantitative analysis of DMF in wastewater and provided as a good central control analysis method of recycling conditions of wastewater.