▎ 摘　　要

NOVELTY - A graphene aerogel adsorbent comprises 0.5-20 pts. wt. graphene and 50-100 pts. wt. triethylenetetramine. USE - The graphene aerogel adsorbent is used as solid phase extraction adsorbent for detecting phenylurea herbicides in water (claimed). ADVANTAGE - The adsorbent solves high detection limit and poor reusability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the aerogel adsorbent comprising y oxidizing graphite powder by improved Hummers method, adding to water, and ultrasonically treating in water; adding triethylenetetramine and hydrothermal reacting; putting hydrogel in dialysate and dialyzing; and freezing, thawing, and air-drying.