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摘要：红外分光光度法测定水体中油类浓度方法简单、快捷、准确、灵敏度高，完全适用于地表水、地下水、生活污水、工业废水中的油类含量测定需求，应用领域较广。本文将该法与其它常见油类测定方法的原理及优缺点进行分析比较，通过使用OIL480型红外测油仪测定地表水中总油浓度，对结果进行影响因素探讨。优化实验结果表明，pH在1-2,温度25℃±2℃,萃取剂投加量为30mL-35mL条件下，测定仪器操作的检出限0.18mg/L，精密度达0.530%-2.114%，准确性相对误差小于4.326%，加标回收率在88.1%-100.3%之间，质控样无失控倾向，精密度、准确性令人满意，提高了测定数据的准确性。10424
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关键词： 红外分光光度法；油类；影响因素；RSD
Application of oil in water quality by infrared oil analysis instrument
Abstract: The infrared spectrophotometric method for the determination of oil in water concentration method is simple, fast, accurate, high sensitivity, and is fully applicable to the determination of oil content which includes the surface water, groundwater, sewage and industrial waste water. Infrared spectrophotometry was analyzed and compared with the principle and the advantages/disadvantages of other common oils’ measurement method, by using OIL480 Infrared Oil Content Analyzer to determine the concentration of total oil in surface water, and explore the impact factors. The results of optimization experiments showed the Instrument operation detection limit was 0.18mg/L, precision 0.530%-2.114%, the relative error of accuracy less than 4.326%, and the recoveries ranged from 88.1% to 100.3%, when pH was 1-2, temperature was 25 ± 2 ℃, extracting dosage was in 30mL-35mL. The quality control samples had no tendency of being out of control, precision, accuracy are satisfactory and improved the accuracy of the measurement data.
KeyWords: Infrared-Red spectrophotometry; Oils; Influence factor; RSD
目 录
1 引言 1
1.1 选题背景.1
1.2 研究意义与内容.2
2 水样中油类测定方法..3
2.1 常见的油类测定方法..3
2.1.1 重量法.3
2.1.2 紫外分光光度法3
2.1.3 荧光光度法 4
2.1.4 非分散红外光度法 4
2.1.5 红外分光光度法 5
2.2 红外分光光度法影响因素 6
2.2.1 萃取剂四氯化碳投加量 6
2.2.2 酸度 6
2.2.3 温度..6
3 OIL480红外测油仪测定油类实验部分 6
3.1 实验及工作原理 7
3.2 实验方案的确定 8
3.3 实验装置及流程 9
3.4 样品采集 9
3.5 实验试剂及仪器 10
3.6 实验方法 11
4 实验结果与讨论 12
4.1 标准曲线 12
4.2 正交实验 13
4.3 pH对测定结果的影响 14
4.4 温度对测定结果的影响 15
4.5 萃取剂投加量对测定结果的影响 16
4.6 检出限、精密度、准确度、加标回收率 16
4.7 质量控制图 18
4.8 实际水样测定结果.20
5 结论与建议 21
5.1 结论.21
5.2 建议.21
谢辞 22
参考文献 3
附录一 红外分光光度法测油原理定量分析 5