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摘要：建立准确度好、可靠性高消暑产品中乙醇检测的标准测定方法，不仅能够确保监测数据真实有效，而且对于消暑产品的质量和评价，消费者的使用安全、人体健康具有显著的意义。乙醇含量是消暑产品的重要参数之一，它将影响消暑产品在体内的分布。毛细管气相色谱法气相色谱毛细管柱因其高分离能力、高灵敏度、高分析速度等独特优点而得到迅速发展。本论文建立了毛细管气相色谱法测定消暑产品中的乙醇含量，方法学试验结果表明，本实验所建立的含量测定方法切实可行。实验以正丙醇为内标物，内标法测定消暑液中乙醇含量，结果表明，所建立的方法在选定的浓度范围内，具有良好的线性关系，相关系数在0.998以上，精密度的相对标准偏差均小于5%，回收率在94.4%～107.4%之间，说明本法定性、定量准确，可靠，准确度和回收率较高，可用于消暑产品中乙醇含量的测定。利用建立的方法测定消暑产品的乙醇含量，结果表明：宝宝金水、花露水中乙醇含量分别为77.4%和79.4%。35143
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毕业论文关键词： 消暑产品；气象色谱法；乙醇含量测定
Abstract:To establish a good accuracy, high reliability refreshing products in ethanol detection standard determination method can not only ensure the monitoring data is true and effective, and for the summer heat product quality and evaluation, the use of consumer safety, health is significant. The content of ethanol is one of the important parameters of cooling products, it will affect the refreshing products distribution in vivo. Capillary gas chromatography capillary column has been developed rapidly because of its unique advantages, such as high separation capability, high sensitivity, high speed of analysis and so on.. This paper established capillary gas chromatography method for the determination of the content of ethanol in the summer heat product, method of test results show that the established method for the content determination of feasible. Experiment with propanol as internal standard, internal standard method for the determination of ethanol content in the refreshing liquid. The results show that the established method in the selected concentration range, with good linear relationship, correlation coefficient over 0.998, relative standard deviation of the precision were less than 5%. Recovery rate of 94.4% to 107.4% between, illustrate the method qualitatively and quantitatively accurate, reliable, accuracy and high recovery rate can be used for the determination of ethanol content in cultivated products. Determination of ethanol content of cultivated products using established methods, results show that: baby Jinshui, toilet water ethanol content respectively 77.4% and 79.4%.
Key word:Refreshing products；meteorological chromatography；ethanol determination
目录
1 引言 5
1.1 论文的目的和意义 5
1.2 国内外研究现状、水平和发展趋势 5
1.3 乙醇的性质 6
1.3.1物理性质 6
1.3.2化学性质 7
消去反应和脱水反应 8
与活泼金属反应 8
上下游原料及产品 8
1.5 本论文拟解决的问题 9
2 毛细管气相色谱法测定消暑产品中的乙醇含量 10
2.1 概述 10
2.2 仪器和试剂 11
2.3 实验方法 11
2.3.1 毛细管气相色谱法测定乙醇的分析方法建立 11
2.3.2 消暑产品中乙醇含量的测定 12
2.4结果与讨论 12
2.4.1 方法的专属性 12
2.4.2 线性关系 13
2.4.4稳定性 14