爆炸残留物中硝酸根离子的可视化检测:粉试剂检验法

Visual Detection of Nitrate Ions in Explosive Residues:Powder Reagent Assay

针对爆炸案件现场硝酸根离子快速、可视化检验而提出的关键问题,解决了《微量物证分析实验》中Griss试剂毒性大、响应速度慢以及现有仪器分析方法不便携带的问题。主要采用8-羟基喹啉替代具有致癌性的α-萘胺或盐酸萘乙二胺,4-氨基苯甲酸替代对氨基苯磺酸;硫酸锰作为催化剂,可与8-羟基喹啉形成配合物,提高偶氮反应的速度,利用明显的视觉颜色变化(无色到橙红色)可以实现对爆炸案件现场残留物中硝酸根离子进行定性与半定量分析。

This experiment is proposed for the rapid and visual inspection of nitrate ion at the scene of the explosion case,which solves the problems of high toxicity,slow response speed of Griss reagent and inconvenience of carrying the existing instrument analysis methods in the Micro Material Evidence Analysis Experiment.8-hydroxyquinoline is used to replace carcinogenicα-naphthylamine or naphthalene ethylenediamine hydrochloride,4-aminobenzoic acid replaces p-aminobenzenesulfonic acid;Manganese sulfate,as a catalyst,can form a complex with 8-hydroxyquinoline to improve the speed of azo reaction.With obvious visual color change(colorless to orange red),qualitative and semi quantitative analysis of nitrate ions in the residues at the scene of explosion cases can be achieved.