haypiny
第1楼2013/01/24
Automated Hydrazine Reduction Method: Nitrate is reduced to nitrite by hydrazine sulfate. The nitrite concentrations is determined by diazotizing with sulfanilamide and coupling with NED dihydrochloride to form a colored azo dye that is measured colorimetrically.
用百度来翻译了一下,不知道对不对:
自动水合肼还原的方法:硝酸盐还原成亚硝酸盐,硫酸肼。亚硝酸盐的浓度被确定由重氮化与NED二盐酸盐与对氨基苯磺酰胺和耦合,形成了着色的偶氮染料,测量色度。
haypiny
第9楼2013/01/29
利用还原剂(如Cd-Cu柱)将NO3-还原为NO2-,这个重复性不是一般人能掌握的!
水星
第10楼2013/01/30
你这种办法就是先测定一次亚硝,还原后再测一次,俩次的差值就是硝酸?