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本文在试验研究的基础上 ,基于硫酸介质中重铬酸钾氧化乙醇的反应 ,建立了火场残留物样品中助燃剂乙醇的定性鉴定和定量测定技术。定性鉴定的灵敏度为 :检出限量 5μg,最低浓度 10 0 ppm。定量测定的检出限 1.2 2μg/m L ,线性范围 0 .10～ 3.2 0 mg/m L。鉴定技术的灵敏度高 ,重现性好 ,所用仪器简单 ,不需要复杂的前处理。并且利用同一种体系 ,既可进行乙醇的定性鉴定 ,又能实现乙醇的定量测定。本文从火灾物证样品的分离提取、利用化学计量学的方法制作标准曲线回归方程、求相关系数 ,到样品的分析鉴定 ,分析结果的报出 ,介绍了火场残留物样品中助燃剂乙醇的定性鉴定和定量测定技术的整个过程
Based on the experimental research, based on the reaction of potassium dichromate oxidation of ethanol in sulfuric acid medium, a qualitative identification and quantitative determination of ethanol as a combustion improver in a fire residue sample was established. Qualitative identification of the sensitivity: detection limit of 5μg, the lowest concentration of 10 0 ppm. The limit of quantitation was 1.2 2 μg / mL and the linear range was 0.10 ~ 3.2 0 mg / mL. Identification of high sensitivity, good reproducibility, the instrument used is simple, does not require complex pre-treatment. And the same system, both for the qualitative identification of ethanol, but also to achieve quantitative determination of ethanol. In this paper, we extracted the samples of fire evidence and used the chemometrics method to make the standard curve regression equation, and obtained the correlation coefficient, analyzed and appraised the samples, reported the results, and introduced the qualitative identification of the oxidant in the fire residue samples And quantitative measurement of the entire process