Do not use slaked lime or unslaked lime.

不要使用生石灰或是熟石灰。

Experiments show that causticizing by adding a small quantity of slaked lime can eliminate the interference of carbonate ions and humic acid salts.

添加少量的熟石灰可即刻消除碳酸根和腐植酸盐等有机杂质的影响。