A syringe needle filled with K Fe(CN )/ KFe(CN) redox system was used as reference electrode.
A syringe needle filled with K Fe(CN )/ KFe(CN) redox system was used as reference electrode.
把K Fe（CN）／KFe（CN）体系填入医用注射针头内成为参比电极。
A syringe needle filled with K Fe(CN )/ KFe(CN) redox system was used as reference electrode.
把K Fe（CN）／KFe（CN）体系填入医用注射针头内成为参比电极。