全部

1·Results Active carbon and ferric nitrate were selected to prepare composite material for removal of arsenic in drinking water.

结果 选择以活性炭为载体材料、硝酸铁为活化试剂制备饮水复合除砷材料。

2·The sulfidation performance of iron oxide prepared from various precursors was investigated, and the ferric nitrate with better sulfidation performance was chosen as precursor of active component.

实验通过对各种铁盐前驱物制备的氧化铁硫化性能的考察，优选出硫化性能好的硝酸铁作为活性组分前驱物；

3·He can use ferric chloride, the copper wire to the melting off; I can use silver nitrate, to connect to a breakpoint.

他可以用氯化铁，把铜导线给溶断；我就可以用硝酸银，把断点给接上。

4·Methods The samples of phytic acid were determined with thorium nitrate titration, ferric spectrophotometry, phosphorus spectrophotometry and high performance liquid chromatography respectively.

方法用硝酸钍滴定法、测铁分光光度法、测磷分光光度法及高压液相色谱法对不同样品植酸含量进行测定。