| 蒋梦云1，2，巩文雯1，刘庆菊1，胡 彬3，张婷婷2，韩 平1.辣椒及土壤中咯菌腈、精甲霜灵和溴氰虫酰胺的残留及消解动态研究[J].广东农业科学,2018,45(11):60-67 |
|
查看全文
HTML
辣椒及土壤中咯菌腈、精甲霜灵和溴氰虫酰胺的残留及消解动态研究 |
| Residue and degradation of fludioxonil, metalaxy-M and cyantraniliprole in pepper and soil |
| |
| DOI：10.16768/j.issn.1004-874X.2018.11.010 |
| 中文关键词: 咯菌腈 精甲霜灵 溴氰虫酰胺 盆栽辣椒 灌根施药 残留分析 |
| 英文关键词: fludioxonil metalaxy-M cyantraniliprole potted pepper soil application residue analysis |
| 基金项目:北京市农林科学院创新能力专项（20170302）；北京世园会百蔬园建设配套项目（PXM2017-036203-000058）；农业部农产品质量安全风险评估实验室（北京）开放课题（kfkt201810） |
|
| 摘要点击次数: 1812 |
| 全文下载次数: 772 |
| 中文摘要: |
| 采用改良QuEChERS法结合超高效液相-串联质谱法（UPLC-MS/MS）建立咯菌腈、精甲霜灵和溴氰虫酰胺在辣椒和土壤中的残留分析方法，并通过灌根方式对盆栽辣椒进行施药，研究了3种农药在辣椒和土壤中的残留降解规律。结果表明，样品采用乙腈提取，QuEChERS方法净化，在0.01~0.1 mg/kg添加水平下，3种农药在辣椒和土壤中的平均添加回收率分别为93.4%~111.6%、86.9%~108.8%和82.0%~106.4%；日内和日间相对标准偏差范围分别为1.3%~8.2%和2.6%~6.8%，通过添加方法确定3种农药在辣椒和土壤最低检测浓度（LOQ）为0.0005 mg/kg。大棚种植条件下，3种农药在辣椒中的消解半衰期分别为5.4、8.7、13.9 d。按推荐剂量和1.5倍推荐剂量于辣椒半成熟期时灌根施药1次，距施药14 d时，3种农药在辣椒中的最大残留量均小于0.1 mg/kg。由于盆栽蔬菜的施药是特殊场景，目前我国尚未对其合理施药制定相关标准，研究结果可为了解灌根施药方式下3种农药的持效期及其在盆栽辣椒上合理使用相关标准的制定提供理论依据。 |
| 英文摘要: |
| A reliable analytical method for determining the residues offludioxonil, metalaxy-M and cyantraniliprole by UPLC-MS/MS combined modified QuEChERS was developed, and applied to investigate the residue and degradation of three pesticides in potted pepper and soil after soil application under greenhouse condition. The target compounds were extracted using acetonitrile, cleaned up with QuEChERS purification methods. At the 0.01 to 0.1 mg/kg levels, the average recoveries of three pesticides in pepper and soil were in the range of 93.4%-111.6%, 86.9%-108.8% and 82.0%-106.4%, respectively; with relative standard deviations were1.3%-8.2% and 2.6%-6.8% for intra-day and inter-day determinations, respectively. The limit of quantification （LOQ） of three pesticides were all 0.0005 mg/kg in pepper and soil. Under greenhouse conditions, the half-lives of three pesticides in pepper and soil were 5.4, 8.7 and 13.9 d, respectively,suggesting that these compounds were easily degradable in environment. The final residues of three pesticides in pepper were lower than 0.1 mg/kg at the interval 14 dafter soil application at recommended dosage and 1.5-fold of recommended dosage for once. Because pesticide application in potted vegetables is a special situation, there is no relevant standards in China at present.The results were helpful for understanding the persistance of these pesticides in potted pepper after soil application mode, and providing theoretical basis for the establishment of related standards. |
|
查看/发表评论 下载PDF阅读器 |
