Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, PR China.
Chemosphere. 2012 Apr;87(2):132-6. doi: 10.1016/j.chemosphere.2011.11.076. Epub 2011 Dec 26.
The fate of chlorantraniliprole was studied in rice field ecosystem, and a simple and reliable analytical method was developed for determination of chlorantraniliprole in soil, rice straw, paddy water and brown rice. Chlorantraniliprole residues were extracted from samples with acetonitrile. The extract was cleaned up with QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) method, and determined by high-performance liquid chromatography electrospray ionization tandem mass spectrometry (LC-ESI-MS/MS). The average recoveries were 76.9-82.4% from soil, 83.6-89.3% from rice straw, 95.2-103.1% from paddy water and 84.9-87.7% from brown rice. The relative standard deviation was less than 15%. The limits of detection (LODs) of chlorantraniliprole calculated as a sample concentration (S/N ratio of 3) were 0.012 μg L(-1) for paddy water, 0.15 μg kg(-1) for soil, brown rice and rice straw. The results of the kinetics study of chlorantraniliprole residue showed that chlorantraniliprole degradation in soil, water and rice straw coincided with C=0.01939e(-0.0434t), C=0.01425e(-0.8111t), and C=1.171e(-0.198t), respectively; the half-lives were about 16.0 d, 0.85 d and 3.50 d, respectively. The degradation rate of chlorantraniliprole in water was the fastest, followed by rice straw. The final residues of chlorantraniliprole on brown rice were lower than maximum residue limit (MRL) of 0.02 mg kg(-1) after 14 d Pre-Harvest Interval (PHI). Therefore, a dosage of 150 mL a.i.hm(-2) was recommended, which could be considered as safe to human beings and animals.
氯虫苯甲酰胺在稻田生态系统中的命运进行了研究，并开发了一种简单可靠的分析方法，用于测定土壤、稻草、稻田水和糙米中的氯虫苯甲酰胺。氯虫苯甲酰胺残留用乙腈从样品中提取。提取物用 QuEChERS（快速、简便、廉价、有效、坚固和安全）方法净化，并通过高效液相色谱-电喷雾串联质谱法（LC-ESI-MS/MS）测定。从土壤中平均回收率为 76.9-82.4%，从稻草中为 83.6-89.3%，从稻田水中为 95.2-103.1%，从糙米中为 84.9-87.7%。相对标准偏差小于 15%。氯虫苯甲酰胺的检出限（LOD）按样品浓度（S/N 比为 3）计算，为稻田水 0.012 μg L(-1)，土壤、糙米和稻草 0.15 μg kg(-1)。氯虫苯甲酰胺残留动力学研究结果表明，氯虫苯甲酰胺在土壤、水和稻草中的降解符合 C=0.01939e(-0.0434t)、C=0.01425e(-0.8111t)和 C=1.171e(-0.198t)，半衰期分别约为 16.0 d、0.85 d 和 3.50 d。氯虫苯甲酰胺在水中的降解速度最快，其次是稻草。在 14 天的采收前间隔（PHI）后，糙米上的氯虫苯甲酰胺最终残留量低于 0.02 mg kg(-1)的最大残留限量（MRL）。因此，推荐使用 150 mL a.i.hm(-2)的剂量，这对人类和动物来说是安全的。
