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1·The ferrous oxalate with crystal water was prepared with ferrous ammonium sulfate and oxalic acid in acid medium.

采用硫酸亚铁铵和草酸溶液在酸性介质条件下合成含有结晶水的草酸亚铁。

2·There were no apparent different effects between using ferrous sulfate and using ferrous ammonium sulfate, the former was much cheaper and no secondary pollution.

用硫酸亚铁的效果与用硫酸亚铁胺的效果相差不大，且前者价格便宜，使用中不会造成二次污染；

3·In accordance with ferrous ammonium sulfate in water samples to calculate the amount of material to restore the volume of oxygen consumption, which was potassium dichromate titration reflux.

根据硫酸亚铁铵的用量算出水样还原性物质消耗氧的量，这就是重铬酸钾回流滴定法。

4·A new method for determining phosphorus by spectrophotometry was developed, which USES ammonium ferrous sulfate and glucose as mixed reductant. The optimum conditions were determined.

用硫酸亚铁铵和葡萄糖作为混合还原剂，建立了用分光光度法测定磷的方法，确定了最佳测定条件。

5·And The best recipe was drawn as follows: ammonium sulphate 0.5%, ferrous sulfate 0.2%, potassium phosphate dibasic 0.1%.

通过单因素和正交试验得到了无机盐的最适添加量：硫酸铵添加0.5%，硫酸亚铁添加0.2%，磷酸氢二钾添加0.1%。