残渣态即水体中的忌浮物沉积物或土壤等从水中吸附的金属，以及包含在矿物晶络，所形成的化学形态。残渣态与非残渣态的区别是前者结台的金属已被固定，不能再释放到水，后者可把金属重新释人水中。残法态的提取方法一般用浓酸(如硝酸，气氟酸、过氯酸)或偏硼酸锉熔融，再用硝酸提取。其化学组成和结构，可用各种仪器进行分析鉴定:
残渣态一般称为非有效态，不易释放出来。
Residual is known as unavailable state, which is not easily released.
钙镁磷肥、胡敏酸互作可增加土壤残渣态铅的含量。
Mutual effects of calcium magnesium phosphate and humic acid enhance residual lead contents in soil.
锌（Zn）非残渣态含量有随城市化程度加剧而增加的趋势。
The research found that the content of Non-residual Zinc(Zn) would be increased with the increasing degree of urbanization.
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