| 刘春梅1，2，万凯1，冯莉3，黄健祥1，杨兰1，2，刘聪云1，王富华1.二氯喹啉酸在水稻田环境中的消解动态研究[J].广东农业科学,2014,41(8):206-208 |
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二氯喹啉酸在水稻田环境中的消解动态研究 |
| Degradation dynamics of quinclorac in paddy field |
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| DOI： |
| 中文关键词: 二氯喹啉酸 水稻田 消解动态 液相色谱-串联质谱 半衰期 |
| 英文关键词: quinclorac paddy field degradation dynamics liquid chromatography-tandem mass spectrometry half
life |
| 基金项目:国家公益性行业(农业）科研专项(201203098） |
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| 中文摘要: |
| 为了明确二氯喹啉酸在保持水层和水层自然沉降两种处理下的稻田环境中的消解趋势，于2012 年在
广州市进行田间试验，利用液相色谱-串联质谱法检测二氯喹啉酸在水稻田环境中的消解动态。结果显示，二氯喹啉
酸在稻田水和稻田土壤样品中的检出限(LOD）分别为0.001 mg/L 和0.001 mg/kg。当添加水平为0.01、0.10、1.00 mg/L
或mg/kg 时，二氯喹啉酸在稻田水中的回收率范围为83.93%~106.75%，相对标准偏差(RSD）为2.3%~6.3%，在稻田土
壤中的回收率范围为83.23%~113.50%，RSD 为2.6%~4.4%；二氯喹啉酸在稻田水和稻田土中的降解符合一级化学反
应动力学方程C=Coe-kt；在保持水层的稻田中，二氯喹啉酸在田水和土壤中的半衰期分别为8.7、14.1 d，在自然沉降的
稻田中，二氯喹啉酸在土壤中的半衰期为10.8 d。 |
| 英文摘要: |
| Degradation dynamics of quinclorac in two treatments of paddy field (maintaining the field water through
necessary irrigation, named treatment A, keeping the field water in natural sedimentation, named treatment B) was studied
in Guangzhou in 2012. Liquid chromatography-tandem mass spectrometry analytical method was developed to determine
the residue of quinclorac in water and soil. Results showed that the limit of detection (LOD) of quinclorac in water and soil
was 0.001 mg/L and 0.001 mg/kg, respectively. The average recovery rate of quinclorac was from 83.93% to 106.75% in
paddy water when the spiked level was 0.01, 0.1 and 1.00 mg/L or mg/kg, with the relative standard deviation (RSD) from
2.3% to 6.3%, and from 83.23% to 113.50% in paddy soil, with the RSD from 2.6% to 4.4%, respectively. The degradation
of quinclorac in paddy water and paddy soil fitted for the first-order chemical kinetic equation C=Coe-kt. The half lives of
quinclorac were 8.7 and 14.1 days in paddy water and paddy soil respectively in treatment A, and 10.8 days in paddy soil
in treatment B. |
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