编辑同志: 试剂钼酸铵的分子式为(NH_4)_6Mo_7O_(24)·4H_2O,不管是分析纯或优级纯的,如果用它作为基准物配制标准溶液(容量或者比色),都有不够准确的现象存在。因为我们发现众多家的操作规程和某些杂志书藉上也都有采用钼酸铵作基准物的,但根据我们使用情况和感觉到的问题,简略地谈谈看法,并建议用三氧化钼作为基准物。 Edit comrades: Reagents Ammonium molybdate molecular formula (NH 4) _6Mo_7O_ (24) · 4H_2O, whether analytical or superior pure, if it is used as a reference standard solution (capacity or colorimetric), are not accurate enough The phenomenon exists. Because we found a lot of home operating procedures and some magazine books are also used ammonium molybdate as a benchmark, but according to our use and feel the problem, briefly talk about the view and suggested the use of molybdenum trioxide As a benchmark.