CAJ | 학술논문

用超声振荡与一种快速、简易、廉价、高效、可靠、安全的分离方法(简称QuEChERS)法相结合的技术研究水稻土壤中五氯酚的提取.就萃取剂、酸用量、提取方式、吸附剂种类以及吸附剂用量等因素对回收效率的影响作了比较.结果表明,最佳条件为: 用10mL乙腈为提取液,2 mL浓度为6 mol/L的H_2SO_4酸化,加2 mL正己烷,振荡30min,40℃超声1 h,离心后上清液再选用20 mg ODS和200 mg无水硫酸镁净化.在高、中、低3个不同浓度的土壤中,都可以稳定在75%～120%的回收率.
용초성진탕여일충쾌속、간역、렴개、고효、가고、안전적분리방법(간칭QuEChERS)법상결합적기술연구수도토양중오록분적제취.취췌취제、산용량、제취방식、흡부제충류이급흡부제용량등인소대회수효솔적영향작료비교.결과표명,최가조건위: 용10mL을정위제취액,2 mL농도위6 mol/L적H_2SO_4산화,가2 mL정기완,진탕30min,40℃초성1 h,리심후상청액재선용20 mg ODS화200 mg무수류산미정화.재고、중、저3개불동농도적토양중,도가이은정재75%～120%적회수솔.
A combination approach of the QuEChERS with ultrasonication and vibration was developed to extract pentachlorophenol (PCP) residue in paddy soil. The results showed that PCP recovery of the approach was dependent on the following factors, i.e. extracting agent, acidification of extraction phase, formula of the absorbent (ingredient and dosage), extracting mode etc.. According to our experience, we propose that the suitable parameters are as follows: 2 mL of H_2SO_4 (6 mol/L) was used to acidify 2 g of soil, 10 mL of acetonitrile and 2 mL of hexane as extracting agent, 20 mg of ODS and 200 mg of anhydrous MgSO_4, vibration (30 min), ultrasonication (1 h, at 40℃). The above experimental conditions would be available for extracting PCP from paddy soil with steady recoveries (75%～120%, at different concentration levels of PCP).