关键词: 溴甲酚绿, 溴甲酚蓝, 四丁基碘化铵, 四甲基联苯胺, 潜血印痕

Abstract:

Objective To establish a new method for developing latent blood prints. Method A mixed bromocresol green, bromocresol blue and tetrabutyl ammonium iodide ethanol solution was used to develop latent blood prints, and the new method was compared to the classic TMB. Results The new developing solution was very sensitive to the latent prints made by blood diluted to one-thousandth. The developed bloody ridges were clear and coherent, with good contrast. Besides, to the latent blood prints dealt with TMB first, the new agent could further enhance the developing effect. Conclusion The new method for developing latent blood print is sensitive and has good effect. It could be used to develop blood latent prints after TMB. It could improve the detection, extraction and utilization of latent blood prints at crime scenes.

Key words: bromocresol green, bromocresol blue, tetrabutyl ammonium iodide, latent blood print