2.中国水稻研究所农业农村部稻米及制品质量监督检验测试中心,杭州 310006
1.College of Energy and Environmental Engineering, Hebei University of Engineering, Handan 056038, China
2.Rice Quality Supervision and Testing Center, Ministry of Agriculture and Rural Affairs, China Rice Research Institute, Hangzhou 310006, China
采用QuEChERS-LC-MS/MS法建立了稻田模拟系统中残留的4种目标抗生素的检测方法。样品经5%甲酸-乙腈提取,用内标法进行定量。结果表明,4种目标抗生素在0.10~100 μg·L
。4种目标物质在稻田水、稻米、水稻植株(地上部分和地下部分)和稻田土壤中的回收率分别为82.8%~166.1%、78.1%~103.5%、94.5%~97.8%、67.7%~100.2%、86.7%~93.9%,相对标准偏差分别为0.3%~8.3%、1.4%~3.8%、1.1%~6.8%和1.1%~2.4%。通过建立稻田模拟系统,长期用含相应质量浓度抗生素的污水灌溉,对稻田模拟系统中抗生素的残留进行了检测。检测结果表明,SMT和ROX在各基质中均有检出,检出质量浓度为未检出~250.908 μg·kg
。
A method was developed for the determination of four target antibiotics residual in the rice field simulation system by liquid chromatography-tandem mass spectrometry (LC-MS/MS) coupled with QuEChERS. By optimizing the pretreatment conditions, 5% formic acid-acetonitrile was used to extract the antibiotics in each matrix, and the internal standard method was used to quantization detection. The results show that the four target antibiotics had a good linear relationship in the range of 0.1—100 μg·L
>0.998). The limits of detection (LOD) of ofloxacin (OFX), sulfamethoxazole (SMZ), roxithromycin (ROX) and tetracycline (TET) were 0.10, 0.10, 0.05 and 0.20 μg·L
, respectively. The average recoveries of the four target compounds in paddy water, rice flour, rice plants (aboveground and underground parts) and paddy soil were 82.8%—166.1%, 78.1%—103.5%, 94.5%—97.8%, 67.7%—100.2%, 86.7%—93.9%, respectively, with relative standard deviations (
, n=6) of 0.3%—8.3%, 1.4%—13.8%, 1.1%—6.8% and 1.1%—2.4%, respectively. A paddy field simulation system was established and irrigated for a long-term by the simulated wastewater containing antibiotics with the corresponding mass concentration. The antibiotic residues in the paddy field simulation system were detected. SMT and ROX were detected in each matrix, and the detected mass concentration was not detected-250.908 μg·L
. OFX and TET were not detected in rice flour, but were detected in all other matrices, and the detected mass concentration was not detected —272.354 μg·L
.
.
不同提取溶剂对稻田土壤中目标抗生素的回收率影响
Effects of different extraction solvents on the recovery of target antibiotics in paddy soil
Recovery of target compounds under different substrate conditions
Accumulation of target compounds in rice
Accumulation of target compounds in plants (aboveground part)
Accumulation of target compounds in plants (underground part)
Accumulation of target compounds in paddy soil
Linear ranges, linear relationship, correlation coefficient and limit of detection (LOD) of the target compounds
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