The optimum program of preparing the simulated emulsion is determined: the volume ratio of crude oil and kerosene must be 4 to 2 or 4 to 3;
确定了配制模拟乳状液的最佳方案为：模拟原油应选择原油与煤油配比为4：2 或4：3 的体系；
The optimum extraction time and ratio of sample weight to extractant volume were chosen according to the extraction results of indicator parameters and heavy metals in leachates.
分别根据表征参量和重金属在萃取溶液中的含量变化确定最优萃取时间和萃取样液比。
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