中文摘要：

本文通过固相萃取结合分子络合物一分散液液微萃取，与高效液相色谱联用，建立了一种测定椰子汁中酸性植物激素的新方法。选择了几种典型酸性植物激素吲哚乙酸、水杨酸、脱落酸和吲哚丁酸作为分析物，考察了该方法的萃取性能。在固相萃取与分子络合物一分散液液微萃取联用模式中，椰子汁中分析物首先吸附在C-18萃取材料上，待解吸完成后，解吸液又可用作分散液液微萃取的分散剂，大大简化了萃取步骤。该方法的富集倍数可达319～478倍，线性关系良好，具有良好的精密度和准确度，有望用于植物激素的检测。

英文摘要：

A new method combining solid-phase extraction（SPE） and molecular complex-based dispersive liquid-liquid microextraction（MC-DLLME） with high performance liquid chromatography（HPLC） has been developed for the determination of several acidic phytohormones in natural coconut juice. Indole-3- acetic acid （IAA）, salicylic acid （SA）, abscisic acid （ABA） and indolyl-3-butyricacid （IBA） were selected to investigate the extraction performance and the method sensitivity. In solid phase extraction-dispersive liquid-liquid microextraction（SPE-DLLME） procedure, analytes were firstly adsorbed onto C18 sorbent from a large volume of coconut juice samples, the eluate containing the desired compounds was used as the dispersive solvent in MC-DLLME procedure, and extraction step was largely simplified. The new method provided a high enrichment factor （319-478） for several acidic phytohormones. Good linearities were obtained for the analytes, and the developed method has also good precision and recovery, which provides application potential in the analysis of phytohormones.