多环芳烃测定中净化方法的研究

对多环芳烃测定中的净化方法进行研究，为了选出最佳净化柱，在一定条件下分别采用硅胶LC-Si、弗罗里LC-Florisil和C18固相萃取净化柱对一定浓度的多环芳烃标准溶液进行净化，测定吸附后流出液多环芳烃浓度，计算吸附率；测定洗脱后流出液多环芳烃浓度，计算洗脱率。测定结果为硅胶、弗罗里和C18固相萃取净化柱对多环芳烃的吸附率分别在87．1％～100％，99．5％～100％和96．6％～100％之间，洗脱率分别在0～106％，78．7％．109％和79．0％～115％之间。结果表明，GC／MS内标法测定样品中多环芳烃使用最理想的净化柱为弗罗里净化小柱，其次为C18净化小柱，最后为硅胶净化小柱。

Research of the Purification Method in the Determination of PolyAromatic Hydrocarbons

Under given conditions, PAHs standard solutions of a certain concentration were determined with a clean- up procedure by LC - Si, LC - Florisil and C18 solid- phase extraction purification column, the adsorption rates and the elution rates were calculated at the same time. The results obtained were as follows： the absorption rates of PAHs of the three purification column were 87.1% -100%, 99.5% - 100% and 96.6% - 100%, respectively. The elution rates were 0 - 106% ,78.7% - 109% and 79.0% 115 %, respectively. It was shown that the ideal purification column for determination of PAHs by GC/MS internal standard method was LC - Florisil, followed by C18 purification column, and LC - Si in the final.