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硝普钠(SNP)的水溶液具光敏性,光分解形成氰化物及铁氰络合离子:[Fe(CN)_5NO]~(2-)+H_2O→[Fe(CN)_2H_2O]~(2-)+NO[Fe(CN)_5H_2O]~(2-)→5CN~-+分解产物5[Fe(CN)_5H_2O]~(2-)+5CN~-→5[Fc(CN)_6]~(3-)+5H_2O作者采用连续流动分析法分别设计了SNP 水溶液和5%葡萄糖溶液中氰离子以及铁氰络合离子的测定方法。将硝普钠配成200mg/l 的水溶液或5%葡萄糖溶液,以2.5g/l 的氯胺T 水溶液和磷酸二氢钠缓冲液
Sodium nitroprusside (SNP) aqueous solution with photosensitivity, photochemical decomposition of cyanide and ferricyanide complex ions: [Fe (CN) _5NO] ~ (2 -) + H_2O → [Fe (CN) _2H_2O] ~ (2- ) + NO [Fe (CN) _5H_2O] ~ (2-) → 5CN ~ - + Decomposition product 5 [Fe (CN) _5H_2O] ~ (2 -) + 5CN ~ - → 5 [Fc (CN) _6] 3 -) + 5H_2O The authors designed a method for the determination of cyanide ions and ferricyanide complex ions in SNP water solution and 5% glucose solution by using continuous flow analysis. Sodium nitroprusside dubbed 200mg / l of water solution or 5% glucose solution to 2.5g / l chloramine T aqueous solution and sodium dihydrogen phosphate buffer