The water was reacting with the ferrous iron in the tank.

水与水箱中的质产生化学反应。

Add Ferroin indicator and titrate with 0.025 N ferrous ammonium sulphate solution.

加入亚菲绕啉离子，用滴定法测量硫酸亚铵溶液。

Metal complexants such as ferrous complexant and cobaltic complexant are common used in this process.

液相法常用的金剂有亚剂和钴剂等。

Among other reagents used have been ??and titanous ion; a mixture of ferrous ion, oxygen, ascorbic acid , and ethylenetetraaminetetraacetic acid.

使用过的其它试剂有?Ш脱穷牙胱印⒀翘?离子氧，抗坏血酸和乙四胺四乙酸混物。

CONCLUSION Ferrous Lactate tablet is a highly effective drug as Ferrous succinate tablets and with endurably mild side effects to patients with IDA.

结论乳酸亚片治疗IDA疗效好，胃肠不良反应轻，患者耐受性好，是治疗IDA安全、有效的口服剂。

Compund polymer with alumium polychloride and ferrous polysulfate as its main ingredients was used as water scavenging agent in the treatment of dye-house waste water.

用以聚氯化铝、聚硫酸为主的复聚物作净水剂,处理印染废水。