采用分子印迹技术制备了贝母辛分子印迹聚合物,考察了贝母辛分子印迹聚合物和非印迹聚合物对贝母辛分子的选择吸附性能。实验结果表明,MIPs对贝母辛的吸附选择性能明显高于NIPs,贝母辛MIPs与NIPs的吸附量分别是67.59μmol/g和21.01μmol/g。研究发现,在碱性介质中,贝母辛可以加强鲁米诺一过氧化氢体系的化学发光。据此,提出了分子印迹固相萃取-化学发光传感器测定贝母辛的新方法,该方法的线性范围为1.0×10-5~1.5×10-3mol/L,检出限为0.15×10-5mol/L,11次平行测定的相对标准偏差为2.9%。此法简单、分析速度快,已成功应用于贝母属类植物中贝母辛的测定。
The peimisine-imprinted polymer was synthesized by molecular imprinting technique. The selective adsorption performance of the imprinted polymer and non imprinted polymer was in- vestigated. The peimisine-imprinted polymers (IIPs) has higher adsorption capacity and selectivity for peimisine than that of non imprinted polymer. The maximum static adsorption capacity of the imprinted and non-imprinted sorbent for peimisine was 67.59μmol/g and 21.01 μmol/g, respectively. The methods for the determination of peimisine was based on the enhancement of CL of luminol-H2O2 system. A new molecular imprinting chemiluminescence sensor was established for the determination of peimisine. range from 1.0X 10-5to 1.5X 10 -3 The CL intensity was linear to peimisine concentration in the a mol/L, the detection limit was 0.15 X 10-5 mol/L, the rela- tive standard deviation was 2.9 %. This method was applied to the determination of the peimisine in Fritillaria cirrhosa D. Don and Fritillaria thunbergii Miq samples with satisfactory results.