含痕量苯酚的水样与丙酮和环己烷(1+1)的混合溶剂混合,置于控温在60 ℃的微波炉中加热30 s,使苯酚萃取进入有机相,分取部分萃取液在pH 8~9的条件下与衍生试剂乙酸酐反应15 min,所生成的苯酚衍生物用石油醚萃取,分取部分经脱水后的有机相进样作气相色谱分析.色谱测定中采用DB-17毛细管色谱柱(30 m×0.53 mm,1.0 μm)及氢火焰离子化检测器,在优化的条件下测得方法的检出限(3S/N)为0.01 mg·L-1.按所提出方法分析了8个模拟水样,根据测得苯酚的含量值算得其相对标准偏差为4.2%,并按标准加入法求得其平均回收率为94.0%.

Water sample containing phenol was extracted with mixed solvent of acetone and cyclohexane(1+1),heated at 60 ℃ in a microwave oven for 30 s.An aliquot of the extract was reacted with the derivatizing reagent,acetic anhydride for 15 min at pH 8~9.The derivatized product of phenol was then extracted with petroleum ether.An aliquot of the organic phase,after dehydration,was used for GC determination.DB-17 capillary chromatographic column (30 m×0.53 mm,1.0 μm) and hydogen flame ionization detector were used in the gas chromatography.Detection limit (3S/N) found under the optimum condition was 0.01 mg·L-1.Precision and recovery were tested by analyzing 8 simulated water samples with addition of standard phenol,giving values of RSD′s and average recovery of 4.2% and 94.0% respectively.