期刊论文

中文

理化检验-化学分册

1001-4020

2009

45

1

32-34

10.3321/j.issn:1001-4020.2009.01.012

湖南省科技厅项目（2007FJ4156）；

本校为第一机构

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,1.0μm)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 rain 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 chromatogr...