高效液相色谱法测定有机硅涂料中多环芳烃

建立了一种采用高效液相色谱检测有机硅涂料中多环芳烃的方法，该方法所用色谱柱为多聚C18（LC—PAH）柱，流动相为乙腈／水，采用梯度淋洗方式，开始时为40％乙腈，28min后变为82％乙腈，48min后变成100％乙腈，保持8min。该方法的线性范围为0．10-200mg／L，线性相关系数为0．9993-1．0000，平均回收率为69．59％～100．31％，精密度实验RSD为1．34％～7．84％，检测限（S／N=5）为0．05—0．10mg／L。该方法完全可以满足有机硅涂料中多环芳烃的检测要求。

HPLC Determination of PAHs in Silicone Coatings

A HPLC method was established to determine the contents of PAHs in silicone coatings.The analysis was carried out in a reversed-phase polymer C18(LC-PAH) column by gradient elution with acetonitrile/water as the mobile phase.The initial content of acetonitrile was 40%,then changed to 82% after 28 min,and varied to 100% after 48 min,and maintained for 8 min.The linear range was 0.10 to 200 mg/L and the linear coefficients varied from 0.9993 to 1.0000.The average recovery varied form 69.59% to 100.31%,and the relative standard derivation ranged from 1.34% to 7.84%.The limits of detection was 0.05 to 0.10mg/L at S/N=5.This method could satisfy the demand of analysis of PAHs in silicone coatings.