residual contamination meaning in English

残留污染
残余污染物

Standard practice for determination of soluble residual contamination in by soxhlet extraction
索格利特萃取法测定可溶性残余杂质的标准试验方法
Standard test method for determination of residual contamination of materials and components by total carbon analysis using a high - temperature combustion analyzer
用高温氧化分析仪全碳分析法测定材料和元件中残余杂质的标准试验方法