【摘要】 适量(14)~C-辛硫磷农药的新疆灰漠土水溶液经振荡8小时后离心。上清液用Beckman7800液体闪烁计数仪测cpm和Beckman H数(H~#)。用H~#校标法计算测量效率(％Eff)和dpm。实验表明,新疆灰漠土对(14)~C-辛硫磷的吸附率与1(4)~C-辛硫磷在土壤溶液中的浓度无关,但吸附量与(14)~C-辛硫磷在土壤溶液中的浓度呈显著正相关。土壤含水量与吸附率和吸附量之间具有负相关,而土壤pH对吸附率和吸附量无显著影响,降低振荡溶液的温度能降低土壤对(14)~C-辛硫磷的吸附率和吸附量。更多还原

【Abstract】 A mixture of 14C-phoxim, stilled water and the xinjiang gray desert soil was vibrated for 8 hours, then centrifugalized. The above clear liquid was measured in Beckman LS7800 in order to get cpm and Beckman H number(H#). The Measured eficiency (％Eff) and dpm was computed. The expriment shows that the rate of 14C-phoxim absorption by the soil is indepentent on the concentration of 14C-phoxim in the soil solutions but a statisticalv siguificant correlation cxists between the amount of 14c-phoximabsorptinon and the 14C-phoximconc entratien in the soil solution. But a negative significant correlation exists between the rate and amount of 14C-phoxim absorptiom by the soil and the soil moisture. Th pH of the soil solution has no significant effet to the rate and amout of 14C-phoxim absorption by the soil. Increasing the temperiture of the viberated solhoion decreases the rate and amount of 14Cputxim absorption by the soil.更多还原