A on-line SPE (solid phase extraction)-HPLC preconcentration method was developed for the determination of phenolic compounds at trace levels in environmental water sample. XAD-4 and Dowex 1-X8 were used as sorbent in the on-line SPE-HPLC method for the selective enrichment of nine phenolic compounds, which are included in the priority pollutants list of the US EPA. Also alumina prefiltering considerably reduced the amount of interfering peaks due to humic substances that could accumulated due to the preconcentration step and prevent quantification of polar phenolic compounds in environmental water samples. This method was used to determine the phenolic compounds in tap and river water and superiority to the US EPA 625 method in its enrichment factor, pretreatment time, recoveries, and detection limit. The limits of detection were in the range of $0.3-0.9\;\mu}g/L$ in tap water sample.
建立了一种在线
SPE(固相萃取)-HPLC预富集方法,用于测定环境
水样中的痕量
酚类化合物。在线固相萃取-高效
液相色谱法使用 XAD-4 和 Dowex 1-X8 作为吸附剂,选择性富集了 9 种
酚类化合物。此外,氧化铝预过滤也大大减少了腐殖质引起的干扰峰的数量,因为腐殖质可能会在预浓缩步骤中积累,从而阻碍对环境
水样中极性
酚类化合物的定量。该方法用于测定自来
水和河
水中的
酚类化合物,其富集因子、预处理时间、回收率和检出限均优于美国 EPA 625 方法。自来
水样品中
酚类化合物的检出限为
$0.3-0.9;\mu}g/L$。