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联苯胺是现阶段痕迹物证检验实践中常用的检验血潜痕迹的试剂,但经研究证明联苯胺是致癌物,对人体有极大的危害性,所以其应用范围受到严格的限制,并且由于联苯胺价格昂贵、检验成本高从而制约刑事犯罪现场勘查,特别是命案现场勘查质量的提高,经过多次实验发现联苯胺无机盐在弱酸条件下分离出联苯胺根离子可取的对血潜痕迹的显现效果,并对其实践推广进行分析和论证。
Benzidine is a commonly used reagent for testing bloodstain traces in the current stage of evidence verification. However, it has been proved that benzidine is a carcinogen and has a great harm to the human body. Therefore, the application scope of benzidine is strictly limited. Aniline is expensive and high cost of testing to restrict the scene of criminal investigation, especially homicide investigation to improve the quality of site investigation, after many experiments found that benzidine inorganic salt in weak acid conditions, Effect, and its practice to promote the analysis and demonstration.