表面活性剂SDBS对甘薯吸收涕灭威的影响

Effects of Sodium Dodecyl Benzene Sulfonate (SDBS) on Uptake of Aldicarb by Sweet Potatoes

利用水培法研究了阴离子表面活性剂十二烷基苯磺酸钠(SDBS)对甘薯从溶液中吸收涕灭威的影响。结果显示,SDBS对甘薯吸收涕灭威有一定的抑制作用,随着SDBS浓度的增加,抑制作用增强。25d生长动态试验表明,SDBS是一直影响着甘薯对涕灭威的吸收(每个时间点的浓度都低于对照点的浓度)。甘薯对涕灭威的吸收呈线性增长规律(相关系数大于0.85),SDBS浓度越大,线性方程的斜率k就越小。

The effect of an anionic surfactant- sodium dodecyl benzene sulfonate (SDBS) on uptake of aldicarb by sweet potatoes was investigated using water-culture experiment. Eight different concentrations of SDBS (from 0 to 1 000 mg·L-1) were set in the experiment, and the results showed that SDBS could inhibit the uptake. The totally toxic residues (TTR) in sweet potatoes were in a range of from 28.55 mg·kg-1 to 3.43 mg·kg-1 while SDBS concentration varied from 0 to 1 000 mg·L-1, respectively. The extent of inhibition increased with increased concentration of SDBS. Kinetic experiment results for 25 d indicated that the inhibition occurred at each sampling time, with lower concentration of aldicarb in sweet potatoes with SDBS, compared with no SDBS. The uptake amounts of aldicarb in sweet potatoes were correlated with the linear equation, with a correlation coefficient of over 0.85, and the slopes of the linear equations declined with the increased SDBS concentrations.