环境空气中多种羰基化合物的测定

摘要

利用2,4-二硝基苯肼(DNPH)固相萃取在线吸附衍生高效液相色谱-二极管阵列(HPLC-PDA)测定环境空气中的22种羰基化合物,通过试验优化条件,使方法在6.00 μg/L ~1800 μg/L 范围内线性良好,方法检出限为0.025 μg/m3~0.091 μg/m3,加标回收率为93.2%~108%,平行样相对标准偏差<10%.%An analytical method for the simultaneous determination of 22 carbonyl compounds was devel-oped using on-line derivatization 2,4-Dinitrophenylhydrazine(DNPH)solid phase extraction combined with HPLC-PDA.The method showed good linearity between 6.00 μg/L~1 800 μg/L(linear correlation coefficient R2>0.999).The limits of detection(LOD)ranged from 0.025 μg/m3to 0.091 μg/m3and the limits of quan-tification(LOQ)ranged from 0.10 μg/m3to 0.36 μg/m3.The spiked recoveries ranged from 93.2%to 108%, the RSD was less than 10%.