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NIR1700 近红外光谱仪｜油品成分分析

汽油、机油的成分鉴定一直需要在实验室检测，通过NIR1700光谱仪可以实现现场快速检测。

背景

石油产品含有各种不同的 C-H 基团的烃类化合物，例如甲基 -CH3、烯烃 CnH2n、亚甲基 -CH2-和芳烃等。这些官能团含量的变化会导致其近红外光谱的变化，尽管这种变化非常细微，但通过化学计量学方法对光谱数据进行处理，便能得到样品组成变化的信息。存放时间较长或含有水、硫等杂质都会造成商品汽油理化性质的改变。根据国家质量监督检疫总局公布的 2010年产品质量监督抽查结果，超过一成的车用汽油产品不符合国家标准的要求。不合格的汽油会导致车辆在驾驶过程中出现加速无力，抖动的现象，严重者甚至不能启动。同样，不合格的机油会直接影响发动机的性能，缩短发动机寿命。传统实验室油品检测方法存在检测时间长，需要样品预处理，仪器不方便携带，对操作人员要求高等缺点，而采用光纤光谱仪搭建油品检测装置具有操作简单，快速准确，防潮防尘，绿色无损等优点，因此得到了越来越广泛的应用。

图1，炼油厂与商品汽油

光谱仪应用领域
石油公司质量监控 / 油库快速交接 / 加油站快速检测 / 炼油厂中间控制 / 企业油品快速调和分析 / 成品油市场监督质检 / 生物燃料检测 / 汽车行车实验或发动机性能评价

实验搭建
基于 微型光纤光谱仪（NIR1700）、比色皿透射光谱测量支架（R4）、卤素灯光源（HL2000）以及近红外光纤（FIB-600-NIR）搭建的透射光谱测量系统，对商品汽油和机油进行透过率的光谱测量。

图2，汽油与机油近红外光谱

利用 R4 比色皿测量支架和近红外光谱仪，采集到汽油与机油样品的原始光谱后，对原始数据进行归一化和平滑处理，结合化学计量学方法对油品质量进行定性与定量分析。从图2 中可以看出，汽油与机油样品峰型大致相似，但汽油样品会出现重叠的小峰，分析原因可能是由于相对于机油样品，汽油样品具有更多的组分。

      结论
      新葡萄奔驰AMG 近红外光谱仪（NIR1700）能够应用于商品汽油及机油的检测。

参考标准
中华人民共和国国家标准 GB 17930-2013 《车用汽油》

推荐产品：

近红外光谱仪

上一篇： NIR1700 在发光二极管中的应用

下一篇： NIR1700 近红外光谱仪｜水果快速分选

油品成分分析

透射/反射/吸收

微型光谱仪

NIR17S

测量技术

行业应用

案例

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NIR1700 近红外光谱仪｜油品成分分析

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测量技术

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案例