关键词: 玉米, 玉米, 种质基础, 杂种优势群, 杂优模式

Abstract: The uncertainty of measurement for determination residue of pyrethroids in vegetable and fruit by GC method was evaluated. Many Possible sources of uncertainty of measurement in this measurement were analyzed by developing mathematic model and concluding mathematic expression of uncertainty in this measurement. With the use of standard samples, each standard uncertainty was calculated, thus the combined standard uncertainty and expanded uncertainty were determined.