地面水中酚类污染物的树脂吸附富集反相高压液相色谱测定

HPLC Determination of Trace Phenols in Surface Water by Using a Concentration Technique Based on a Macromolecular Porous Resin GDX502

以乙腈－水－醋酸（３１：６８：１，Ｖ／Ｖ／Ｖ）为流动相的反相ＨＰＬＣ－ＵＶ法，可以方便地对水中酚类进行直接分离和分析。采用树脂吸附法为ＨＰＬＣ的预富集步骤，选用国产吸附树脂ＧＤＸ－５０２为富集剂，二氧六环为洗脱剂，可以定量测定水中μｇ／Ｌ级以下的多种酚。在实验条件下，９种一元酚的平均变异系数为２．４％，其中８种酚的富集回收率大于９０％。用本法测得的地面水的总酚含量与４－氨基安替比林法具有可比性。

A simple method was described for the quantitative determination of phenols in surface water.The resin concentration technique was used instead of solvent extraction, by taking a macromolecular porous resin GDX-502 as an excellentadsorbent and dioxane as an excellent eluant. Theeluate was analysed by a reversed-phase HPLCequipped with a UV detector. Recoveries of ninephenols were higher than 90%, except for 2, 4-dinitrophenol, and the average relative standarddeviation (n= 5) was 2. 4%. The detection limitsof nine phenols were 2. 0- 8. 6 ng. Trace concentration at μg/L level of these phenols pollutantscan be determined. The developed method hasbeen applied to determining phenols of urban lakewater and river water with satisfactory results.