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亚硝酰铁氰化钠曾用于有机分析中甲基酮组化合物的点滴试验,有人曾把它归纳作为测定脂肪酮类化合物的一类试剂加以论述,另外也用于鉴定环状酮化合物,还有应用于很多有机化合物,如硫醇、含硫基团、硫脲以及胱氨酸等化合物的检出。在无机定性分析中作为检出硫离子(S~(-2))的特殊试剂。它在 NaOH 存在下,生成灵敏的紫红色络合物Na_4[Fe(CN)_5NOS],但试剂必须新配,新配的试剂水溶液为浅玫瑰红色,若经长期放置(时间为二周以上)或经日光照射,溶液变为绿色或蓝绿色,则已经变质,此时已不能用于检出硫离子。这是因为在紫外线照射下,亚硝酰铁氰化钠的水溶液发生下列反应,生成五氰水合铁酸钠。
Sodium nitrofen has been used in droplet tests of methyl ketone compounds in organic analysis, and it has been summarized as a class of reagents for the determination of aliphatic ketones, as well as for the identification of cyclic ketone compounds, There are also many organic compounds used, such as thiols, sulfur-containing groups, thiourea and cystine and other compounds detected. Inorganic qualitative analysis as a sulfide reagent (S ~ (-2)) of the special reagents. In the presence of NaOH, it produces a sensitive purplish red complex Na_4 [Fe (CN) _5NOS], but the reagent must be freshly prepared. The new reagent solution is light rose red. If it is left for long periods of time (longer than two weeks) Or by sunlight, the solution becomes green or blue-green, it has been deterioration, at this time can not be used to detect sulfur ions. This is because under UV irradiation, the aqueous solution of sodium nitrite ferricyanide following reaction, generating sodium pentacyanhydrate ferrate.