温度对嗅源气味样本转运的影响

Effect of Temperature on Transporting Odoriferous Samples of Olfactory Source

目的探索警用嗅源气味样本转运过程中温度对其质量及有效性的影响。方法气味样本分别在4、20、25、38℃等温度下密封保存24h,采用警犬气味鉴别与仪器分析相结合的方法,检验分析痕迹嗅源和原物嗅源气味样本在不同温度下保存的质量及有效性。结果嗅源气味样本分别在4、20、25℃温度下密封保存24h,其物质成分不会发生质的变化,也不会影响警犬气味鉴别的结果;嗅源气味样本在38℃温度下密封保存24h,其物质成分变化显著,警犬气味鉴别的准确率也有所下降。结论在警犬技术工作中,可采用低于25℃的密闭环境转运嗅源气味样本,4℃相比25℃环境效果更佳。

Objective To explore the effect of temperature on the quality and effectiveness of odoriferous samples which to take as the policing-purposed olfactory source in order to provide technical support for transportation of relevant samples.Methods The odoriferous samples were kept under the respective experimental temperature of 20°C(of the environment),4°C,25°C and 38°C,with them all being sealed and stored for 24h.Policing dog smelling identifi cation and instrumental analysis were both adopted to detect the trace and original odoriferous samples,with the received data to be analyzed through SPSS 16.0.Results Stored for 24 hours at the temperature of 20°C,4°C and 25°C,the odoriferous samples of policingpurposed olfactory source did not changed substantively,still enabling the policing dog to make correct identification.However,the temperature of 38°C lasting for 24 hours significantly changed the compositions of experimental samples,having caused policing dog decreasing the accuracy of odor identifi cation.Conclusions When policing dog is the choice for detection,the olfactory odoriferous samples had better store and transport in an airtight niche below 25°C,with 4°C the more appropriate.