FIELD: ANALYTICAL METHODS. SUBSTANCE: application area is colorimetric analysis with chemical indicators, analysis of metals using reactive indicator papers, and rapid high-sensitive determination of microquantities of iron in liquid hydrazines. Test solution - liquid hydrazine is preliminarily mixed with acetone and hydrochloric acid and obtained mixture is passed through reaction zone of reactive indicator paper at autogenous temperature 30-60 C. EFFECT: simplified procedure. 1 tbl
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