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

A detection method and technology for blending oil, applied in the field of analytical chemistry, can solve the problems of long experimental period, difficult to distinguish, complicated data, etc., and achieve the effect of convenient operation

Inactive Publication Date: 2015-01-21
TIANJIN POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
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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 m

Method used

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

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Embodiment

[0018] 1) Blending oil near-infrared spectrum collection. Sunflower oil, soybean oil, and peanut oil were selected as base oils to simulate the proportioning blending oil. According to the size of the sample cell, select 10g as the total weight. Using an analytical balance, add the three oils in proportion. Theoretically, the range of peanut oil content to be configured is 1%-40%, and soybean oil and sunflower oil are randomly added without repetition. Run the control software, set the measurement parameters and blank background, and scan the baseline. Spectra will be collected in a near-infrared instrument, and each sample will be scanned three times. Save spectral data in txt format. The wavelength range 800-2500nm adopts the transmission mode, the transmittance, the wavelength range selects the interval of 1nm, the faster measurement speed (1.0nm), the spectral width selects normal, and the scanning method selects repeated scanning. figure 1 It is the near-infrared spe...

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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...

Claims

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Application Information

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IPC IPC(8): G01N21/3577G01N21/359
Inventor 卞希慧李淑娟郭玉高谢传奇王江江
Owner TIANJIN POLYTECHNIC UNIV
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