使用FT-NIR光谱法分析可食用的油

脂肪和油在人类饮食中被认为是重要的营养素，并以各种形式消耗。Bruker光学元件专用FT-NIR光谱仪可以实现可食用油的快速质量控制。即使对于未经培训的员工，分析也很快，经济且安全。

评估食用油质量的参数

用于评估可食用脂肪和油的质量的不同指标参数是：

• 碘值（IV）。
• Free fatty acids (FFA).
• 反式脂肪酸（TFA）。
• 亚赛丁值（AV）。
• 脂肪酸剖面（C16：0，C18：0，C18：1，C18：2，C18：3等）。
• Various other parameters.

Among those parameters, the TFA content is a mandatory legal labelling requirement under the new guidelines of the U.S. Food & Drug Administration.

Conventional Techniques for Edible Oil Analysis

Conventional analyses are normally done using standardized chemical and physical methods sanctioned by the American Oil Chemist Society (AOCS) and/or the association of Official Analytical Chemists (AOAC). However, these techniques are designed for the analysis of only one specific parameter and tend to be time consuming, costly and often performed with hazardous solvents and reagents.

With conventional gas chromatography (GC), the profile of Iodine value (IV), trans and fatty acid can be studied simultaneously, but the analysis takes more than half an hour, not including the time to prepare the sample. Edible oil producers and food processors are therefore seeking alternative fast and non-destructive ways to analyze fats and oils for process and quality control purposes.

NIR的优势用于食用油分析

NIR在食用油分析中的优势是：

• Near infrared (NIR) spectroscopy快速（分析时间大约少于1分钟），并且能够在单个测量中同时分析多组分。
• 它是无损的。
• 不需要特定的样品制备，也不需要使用任何溶剂或试剂。
• It performs real-time measurements with associated time and cost savings.
• 该技术已得到充分识别，AOCS方法CD1E-01使用FT-NIR测量碘值（IV）。
• FT-NIR spectroscopy has the potential to substitute a wide range of classical analysis methods in the edible oil industry. Bruker Optics offers ready-to-use calibrations for edible fats and oils to enable a quick and efficient start.

Further Applications with FT-NIR Spectroscopy

The other applications of FT-NIR Spectroscopy are:

• 除了分析可食用的油和脂肪外，FT-NIR在分析油种子和残留物的油和水分含量以优化压迫过程方面具有巨大的潜力。

• Rape seed breeders can obtain valuable additional information like the content of fatty acids such as Erucic acid and Glucosinolate.

• 近红外光谱是一种快速而经济的方法，可以评估其关键参数的炸油质量：总极性化合物（TPC）和聚合三酰基甘油（TAG）。

Figure 1.FT-NIR absorption spectra of oil samples in the range of 4,500 to 10,000 cm^-1.

Figure 2.Validation results of the Iodine Value (IV) calibration, based on a variety of different oils.

Figure 3.用于静脉校准的光谱区域的详细视图。

图4。Validation results of the FFA calibration, based on olive oil, palm oil and various other oil types.

图5。Validation results of the TFA calibration, based on a variety of different edible oils.

图6。验证导致较低范围为0至2.5％TFA。

图7。Validation results for Oleic Acid, based on various edible oils like palm, soya and sunflower oil.

此信息已从布鲁克光学（Bruker Optics）提供的材料中采购，审查和调整。亚博网站下载

For more information on this source, please visit布鲁克光学.