本powerpoint演示文稿首先简要概述内分泌干扰物（EDC）、雌激素，以及手动和自动固相萃取方法的比较。对资本成本、运营和维护成本进行了成本比较。包括表格、数字。

This powerpoint presentation begins by providing a brief overview of endocrine disrupting compounds (EDCs), estrogens, and a comparison of manual and automated solid phase extraction methods. A cost comparison of capital costs, and operations and maintenance costs is presented. Includes tables, figures.