Rapid detection method for beta vulgaris quality
A detection method and sugar beet technology, applied in the direction of measuring devices, material analysis through optical means, instruments, etc., can solve the problems of cumbersome price, time-consuming operation, high cost, etc., and achieve the effect of simple operation, low power consumption, and saving money
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Embodiment 1
[0038] Example 1 Establishment of regression model
[0039] The establishment of partial least squares regression model of sugar beet quality detection index and near-infrared characteristic wavelength spectrum is as follows:
[0040] 1. Collect a total of 380 samples of 28 varieties of sugar beet, and put them in a sample bag after being sawed and paste.
[0041] The sample will be pretreated (see figure 2 ) The beet saw paste samples are evenly spread in a sample cup with a diameter of 75mm, and scanned 60 times with a resolution of 5nm using a near-infrared analyzer. The temperature of the sample and the environment are both 20±2℃, and the spectral scanning range is 900~1700nm. , Get the near-infrared scanning spectrogram, see the original picture image 3 . Repeat the sample loading measurement twice to maintain the uniformity of the sample loading and obtain the average spectral curve.
[0042] 2. Perform the first derivative (FD), standard normal variable transformation (SNV),...
Embodiment 2
[0045] Example 2 Quality inspection of samples to be tested
[0046] Based on the regression model established in Example 1, quality testing and grading of 70 samples to be tested were performed, and the steps were as follows:
[0047] 1. Pretreatment of the sample to be tested (e.g. figure 2 );
[0048] 2. Spectral scanning of the sample to be tested by the near-infrared analyzer;
[0049] 3. The test results of the sugar content index of the sample to be tested are shown in Table 1.
[0050] Table 1 Comparison of the predicted value of sugar content of sugar beet samples with the measured value of traditional methods
[0051]
[0052]
[0053] One-way analysis of variance results P = 0.9549, r = 0.9599, SEP = 0.439, Bias = 0.023
[0054] From the above analysis results, it can be seen that there is no significant difference between the predicted value of the near-infrared sugar content model and the laboratory true value (P = 0.9549), the correlation between the two sets of data is goo...
Embodiment 3
[0055] Example 3 Establishment of a near-infrared detection model for large sugar beet particles
[0056] The establishment of partial least squares regression model of sugar beet quality detection index and near-infrared characteristic wavelength spectrum is as follows:
[0057] 1. A total of 115 representative sugar beet samples were selected, and they were made into large sugar beet particles and then packed in a sample bag for uniform numbering, and spectral scanning was used for standby.
[0058] Obtaining large beet particles: clean the beet sample, remove the leaf crown, and evenly cut it into 2mm*2mm*2mm particles. Spread the sugar beet particle sample evenly in a sample cup with a diameter of 75mm, and use a near-infrared analyzer to scan 60 times with a resolution of 5nm. The temperature of the sample and the environment are both 20±2℃, and the spectral scan range is 900~1700nm. A near-infrared scan spectrum is displayed. Repeat the sample loading measurement twice to mai...
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