Method for quickly, accurately and quantitatively detecting ratio of various oil components in blend oil

Abstract

The invention relates to a method for quickly, accurately and quantitatively detecting the ratio of various oil components in blend oil. The method comprises the following concrete steps: by taking edible oil as a research object, preliminarily analyzing and researching the content of the components in the blend oil by a near-infrared spectrometry and chemical metering combined process to expectantly find a method for quickly distinguishing the components of the blend oil so as to judge whether a type of blend oil is consistent with a label or not and judge whether the blend oil goes bad or not; experimenting and collecting multiple types of blend oil, simulating configuration of blend oil with different ratios, scanning the spectrum of pure oil and the spectrum of the blend oil through a near-infrared spectrometer, and creating a model for quantitatively analyzing the content of soybean oil, peanut oil and sunflower seed oil in the blend oil through a partial least squares (PLS) method; finally, creating a PLS prediction model by selecting and using an S-G smooth preprocessing method and proper component number, wherein due to the model, the related coefficients of the soybean oil, the peanut oil and the sunflower oil can maximally reach 0.9874, 0.9371 and 0.9456 respectively and the content of the soybean oil, the peanut oil and the sunflower oil in the blend oil can be accurately predicted. Therefore, the quality of the edible plant oil can be quickly and quantitatively analyzed by the near-infrared spectrometry and chemical metering combined process.

Description

technical field [0001] The invention belongs to the field of analytical chemistry and relates to the detection problem of edible vegetable oil quality. Background technique [0002] Edible oil is one of the important necessities in people's daily life. With the improvement of living standards and the increasing emphasis on health, blended oil with balanced nutrition and low price is more and more favored by consumers. Blended oil is made by blending two or more vegetable oils. The blended oil mainly contains: olive oil, sesame oil, peanut oil, flax oil, sunflower oil, soybean oil, corn oil, rapeseed oil, palm oil, etc. However, there is no specific standard for its specific composition and price, and it is difficult to judge its content. It is difficult to have an effective method for judging blended oil, and it is also difficult to make an accurate and quick judgment on blended oil with traditional inspection methods. In particular, it is difficult to analyze the specific...

AI Technical Summary

Problems solved by technology

The above methods can also achieve better results, but there are more or less limitations

Gas chromatography and liquid chromatography require a lot of pretreatment, and the experiment cycle is long, there are many components of oils, and the data is complicated and difficult to distinguish; the discrimination of ultraviolet spectrum is not very high, and the components that produce characteristic peaks can be added of

Images