溶液的电导率对杂质的存在是很敏感的。这就意味着电导率的数值随存在杂质的不同而异，而不只是一个特征常数。
The conductivity of a solution is sensitive to the presence of impurities, so its value is meant to be more an index of impurity than a characteristic constant.
在上流式微膨胀床反应器内，以中东渣油为原料，考察了温度、空速对杂质脱除率的影响。
In a reactor with up flow slightly expanded bed and using Middle East residue as the feedstock, the effects of temperature, space velocity on the removal percent of impurity were studied.
具有浸出时间短、操作方便、生产成本低、杂质去除率高等优点。
It has the advantages of short time immersion, convenient operation, low production cost and high removal of impurity.
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