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Mid-infrared spectrum detection method for quality of whole meal flour
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A technology of infrared spectroscopy and detection methods, which is applied in the field of agricultural product quality and safety analysis and detection, can solve the problems of less quality evaluation of whole wheat flour and whole wheat flour, and achieve the effects of convenient application, rapid detection, and simple operation
Inactive Publication Date: 2018-02-27
NANJING UNIV OF FINANCE & ECONOMICS
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Problems solved by technology
At present, there are few research reports on the bran content in whole wheat flour and the quality evaluation of whole wheat flour
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Embodiment 1
[0026] In this example, through the mid-infrared spectra of more than 250 batches of whole wheat flour and wheat flour at home and abroad, combined with chemometrics, a quality identification model for whole wheat flour was established. It has been verified that the identification effect of the model is good.
[0027] Step 1: Collect domestic and foreign whole wheat flour, and divide the samples into 56 training sample sets and 14 verification sample sets. The sources of the verification sample sets are shown in Table 1;
[0028] Table 1 Example 1 Validation sample set source
[0029]
[0030] Step 2: for the sample set, adopt the burning method to measure the content of ash in all samples;
[0031] The content of ash content in the sample adopts burning method to measure, and finally the measurement result of the ash content of all samples is as follows table 2:
[0032] Table 2 Determination of standard ash content of sample set
[0033]
[0034] Note: n=56 training ...
Embodiment 2
[0048] This embodiment uses the same instrument and modeling method as in Embodiment 1, the difference lies in the composition of the sample set. In this example, wheat flour is added as a training sample set and a verification sample set to test the accuracy of the model. See Table 4 for sources of verification sample sets;
[0049] Table 4 Example 2 verification sample set source
[0050]
[0051]
[0052] Step 1: Collect domestic and foreign whole wheat flour and wheat flour samples, and divide the samples into 60 training sample sets and 14 verification sample sets;
[0053] For the sample set, the ash content in all samples was determined by the ignition method;
[0054] The content of ash content in the sample adopts burning method to measure, and finally the measurement result of the ash content of all samples is as follows table 5:
[0055] Table 5 Determination of standard ash content of sample set
[0056]
[0057] Note: training set samples n=60, validati...
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Abstract
The invention discloses a mid-infrared spectrum detection method for the quality of whole meal flour. The method comprises the following steps: collecting whole meal flour and wheat flour at home andabroad; determining the ash content in all samples according national standard methods; collecting mid-infrared spectrum data in a training sample set; pre-processing a spectrum; establishing a modelby obtained pre-processed spectrum data according to stoichiometrysoftware; identifying a testing sample set in the model; comparing each predicated value of the ash content in the testing sample setwith a known real value to obtain predicated performance parameters of the model. According to the mid-infrared spectrum detection method for the quality of the whole meal flour, disclosed by the invention, the quality of the whole meal flour is identified; the mid-infrared spectrum detection method is simple to operate and can be used for rapidly and accurately evaluating the quality of the whole meal flour.
Description
technical field [0001] The invention discloses a mid-infrared spectrum detection method for the quality of whole wheat flour, belonging to the technical field of agricultural product quality and safety analysis and detection. Background technique [0002] Whole wheat flour is rich in nutrition and has health benefits, and its price is much higher than that of wheat flour. Therefore, it is easy to add a small amount of bran to wheat flour to pretend to be whole wheat flour, or even directly sell wheat flour as whole wheat flour, making it unique. The nutrition and health care functions of this product are greatly reduced. A variety of different brands of whole wheat flour have appeared in the Chinese market, but the whole wheat flour market is relatively chaotic. The formulation of whole wheat flour standards in various companies basically refers to the national standard of wheat flour, or companies launch whole wheat flour products based on their own understanding of whole w...
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