The preparation process of soil mixed samples and single samples is introduced. There is different grain size sample when there are different monitoring items.
主要介绍了土壤采集后的混合样品和单独样品制备过程，并根据不同的分析项目采用不同粒径的过筛样品。
The procedure of sample preparation for residual analysis of organochlorinated pesticides in a paddy soil contaminated by long-term wastewater irrigation was investigated.
研究了不同样品净化方法和方法组合在长年污灌的水稻土有机氯农药残留分析中的效果。
With the advantages of simple sample preparation and high sensitivity, the developed method is a reliable analytical method for trace elements analysis in soil.
该方法样品处理简单，检出限低，灵敏度高，是一种比较可靠的微量元素分析新方法。
应用推荐