RVA-APC combined method for discrimination of ionizing irradiation wheat and flour
A technology of ion irradiation and wheat, applied in the direction of flow characteristics, measuring devices, instruments, etc., can solve the problems of multiple testing procedures, complicated sample processing, and high testing costs, and achieve the effect of reducing costs, simple measurement process, and low cost
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Embodiment 1
[0019] A method for judging ion-irradiated hard winter white wheat comprises five steps. Step 1, take the test wheat sample and unirradiated wheat of the same variety, place of origin and harvest period as a control; Step 2, pretreatment of the sample, grind the sample into flour, and pass through an 80-mesh sieve; Step 3, measure the RVA of the sample, weighing Sample 3.0g, add distilled water 25.0g, then put into RVA measuring instrument and carry out heating measurement, obtain RVA characteristic spectrum in RVA measuring instrument, obtain characteristic spectrum value according to RVA characteristic spectrum; Step 4, sample APC determination; Step 5 Judgment of the results, peak viscosity (1824.7), hot paste viscosity (926.2), final viscosity (1858.5), disintegration value (897.5), reduction value (-34.3) and gelatinization temperature (67.7°C) of the test group, APC value 1.3 ×10 5 cfu / g. The peak viscosity (2393.7), hot pulp viscosity (1299.6), final viscosity (2403.5...
Embodiment 2
[0021] Another method for judging suspected ion-irradiated waxy wheat flour is divided into five steps. Step 1, take the test wheat flour sample and the wheat flour of the same variety as a comparison; Step 2, pre-treat the sample, grind the sample, and pass through an 80-mesh sieve; Step 3, measure the RVA of the sample, weigh 3.0 g of the sample, add 25.0 g of distilled water, and put Enter the RVA measuring instrument and carry out heating measurement, obtain the RVA characteristic spectrum in the RVA measuring instrument, obtain the characteristic spectrum value according to the RVA characteristic spectrum; Step 4, sample APC is measured; Step 5 result judgment, test group peak viscosity (1900.7), Hot paste viscosity (962.7), final viscosity (1876.5), disintegration value (938.1), reduction value (-24.2) and gelatinization temperature (68.1°C), APC value 5.3×10 6 cfu / g, peak viscosity (2135.7), hot pulp viscosity (1109.6), final viscosity (2148.5), disintegration value (10...
Embodiment 3
[0023] The difference with Example 2 is that the control group is flour made from wheat ground of the same variety, place of origin and harvest period, and the APC value of the experimental group is 8.3×10 4 cfu / g, considering that the five RVA characteristic indexes of peak viscosity, hot paste viscosity, final viscosity, disintegration value and reduction value all decreased to a certain extent, while the gelatinization temperature increased, and APC was lower than 10 6 cfu / g, it is determined that the flour sample has been irradiated with ions.
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