高级检索+

基于动态顶空吸附法的花气味量化研究方法比较

Comparison of quantitative research methods for flower scent based on dynamic headspace collection

  • 摘要: 由于花气味能够影响植物与传粉者的相互作用并在香水产业中具有重要价值,研究者们开发出了众多收集花气味的方法。其中,通过连续的气流将花气味收集到吸附剂上的动态顶空吸附法是最为常用的方法。但在实验过程中,研究者们使用的具体方案仍不够统一,这可能会对分析结果造成较大影响。在总结已有文献相关方法的基础上,本研究以典型花香成分标准混合物和大花六道木(Abelia×grandiflora (André) Rehder)为研究对象,分别开展了室内和室外实验,对比了活性碳、Tenax TA与Propak Q 3种吸附剂,正己烷、二氯甲烷两种洗脱溶液,以及推拉法、循环法与闭环法3种连接方法的收集效果。结果显示,Propak Q是综合性能最为优秀的吸附剂,活性炭与Tenax TA分别对于苯类物质与脂肪族物质的吸附能力较差。两种洗脱溶液的效果类似,而3种连接方法中推拉法的综合表现最为优秀,同时能够保持植物的自然鲜活状态。在气味成分未知或需要进行群落水平研究时,推荐采用Propak Q吸附剂与推拉法连接方式进行实验。

     

    Abstract: Floral scents play a critical role in mediating plant-pollinator interactions and hold significant commercial value in the perfume industry. To analyze these scents, researchers have developed various collection methods, with dynamic headspace collection-using continuous airflow to capture volatile compounds onto sorbent traps—being the most commonly used. However, the lack of standardized experimental protocols poses challenges in achieving consistent and reliable results. This study systematically evaluated the performance of three sorbent traps (charcoal, Tenax TA, and Propak Q), two elution solvents (hexane and dichloromethane), and three connection methods (push-pull, circulation, and closed-loop) through controlled indoor and outdoor experiments using a standard mixture of floral scent components and Abelia×grandiflora (André) Rehder. Results showed that Propak Q outperformed the other sorbent traps, while charcoal and Tenax TA exhibited relatively poor adsorption capabilities for benzenes and aliphatic compounds, respectively. The effects of the two elution solvents were similar. Among the three connection methods, the push-pull approach delivered the most consistent results, effectively preserving the natural freshness of floral scents. Based on these findings, the study recommends the use of Propak Q as the preferred sorbent trap and the push-pull method for floral scent experiments, particularly in cases where the composition of volatile compounds is unknown or when community-level analyses are required.

     

/

返回文章
返回