超声萃取-气相色谱法测定棉花秸秆中邻苯二甲酸酯

为了研究PAEs在棉花秸秆中的含量以及积累，将棉花秸秆分为棉桃壳（上段）、近地段（下段）和远地段（中段）三部分分别进行超声萃取处理后，经过柱分离和固相萃取小柱净化后，采用GC法对其所含环境类激素（PAEs）的含量进行分析。结果表明：6种PAEs采用GC分析法在一定范围内呈良好的线性关系，6种物质分离度高；棉花秸秆中PAEs的最高总量为158.86 mg/kg，其中DEHP、DIBP、DBP在三部分中均存在，DEHP含量在棉花秸秆中达到了125.300 mg/kg，也是6种PAEs中最高的，棉花秸秆中段是PAEs的富集区。

Determination of Phthalate Ester in Cotton Stalk by Ultrasonic Solvent Extraction and Gas Chromatography

This paper aimed to study and analyze the distribution of PAEs in cotton stalk and biological accumulation process. Cotton stalk （not including cotton peach shell） was divided into three section （Upper, middle and lower）, and smashed by the grinder. Each section’s PAEs was extracted by ultrasonic method, and Ultrasonic’s extraction was detected respectively by gas chromatography method. The results indicated that each sample Contained PAEs, PAEs had transferred from environment to soil, then to plants. Six kinds of PAEs （DMP, DEP, DIBP, DBP, DAP, DEHP） using GC analysis had a good linear relationship in a certain range, and a high degree of six kinds of material separation. The different section of cotton stalk had different content PAEs. Cotton stalk of the amount of PAEs arrive 158.86 mg/kg, DEHP in cotton stalk reached 125.300 mg/kg. It was the highest in six kinds of PAEs, cotton stalk of PAEs was rich in the middle section.