土壤中单嘧磺隆的超声提取方法研究

Ultrasonic-assisted extraction of monosulfuron in soil

研究了超声波辅助提取土壤中单嘧磺隆的方法,并采用紫外分光光度法进行检测。考察了浸泡时间、超声时间对提取率的影响,并比较了超声提取与振荡提取的提取率。结果表明,随着浸泡时间和超声时间的延长,单嘧磺隆的提取率有所提高;超声振荡比机械振荡的提取效果好。优化试验条件：浸泡时间0.5h,超声时间5min,波长245nm处紫外检测,该方法的最低检出浓度为20μg·kg-1,平均添加回收率为103.29%~115.33%。

The effect of immersed time and ultrasonic time on the extraction ratio was discussed with the ultrasonic extraction and ultraviolet spectrophotometer detection of monosulfuron in soil.The results showed that the extraction ratio was increased by prolonging of immersed time and ultrasonic time,and the ultrasonic extraction was better than mechanical oscillation.The optimal extracted condition was as follows：immersed time was 0.5 h,ultrasonic time was 5 min,and the wavelength was 245 nm.The limit of detection of monosulfuron in soil was 20 μg·kg-1,and the added recovery ratio was 103.29%115.33%.