In order to provide the reference for stuffies of external nucleic acids, we have determinated the DNA quantities in some cereal, fish meat and shellfish meat by means of ultraspectrodensitonietry.

• 本文采用经典的紫外分光光度法对几种谷物和几种鱼肉及贝肉中的DNA含量进行了测定，为外源核酸的材料选择提供参考。