提出了减压蒸馏处理衍生高效液相色谱法测定胶粘剂中甲醛含量的方法。以Agilent Eclipse XDBC18色谱柱为分离柱,以乙腈水(40+60)混合液为流动相,用二极管阵列检测器(DAD)在波长250~500 nm范围内进行扫描。甲醛的质量浓度在1.0 mg·L-1以内与峰面积呈线性关系,方法的检出限(3S/N)为1.2 mg·kg-1。加标回收率在88.8%~98.6%之间,测定值的相对标准偏差(n=6)小于4.3%。与国标法相比,本法降低了前处理温度,并有效区分了甲醛与其他羰基类物质,从而使测定值更加准确。

A method of HPLC with vacaum distillation and precolumn derivatization was proposed for the determination of formaldehyde in adhesives. Agilent Eclipse XDBC18 chromatographic column was used as stationary phase, and a mixture of acetonitrile and water (40+60) was used as mobile phase. DAD and scanning in the wavelength range from 250 nm to 500 nm were adopted in the determination. Linear relationship between values of peak area and mass concentration of formaldehyde was kept in the range within 1.0 mg·L-1, with detection limit (3S/N) of 1.2 mg·kg-1. Values of recovery found by standard addition method were in the range of 88.8%-98.6%, and values of RSD′s (n=6) less than 4.3%. As compared with the method of GB standard, lower temperature was used in the separation by distillation and an effective differentiation between formaldehyde and other carbonyl compounds were attained and hence better accuracy was obtained by the present method.