Sampling and sampling method for risk monitoring of genetically engineered crops of grains

Abstract

The invention relates to a mixing risk monitoring sampling and sample preparing method for a grain type gene engineering crop. The method comprises the following steps: 1, constructing a number of element of primary sampling by virtue of standard normal distribution; 2, preserving confidence interval width and re-constructing a sampling unit; 3, re-defining totality by taking a single sampling amount of a sampler as a unit and calculating the number of units required by sampling; 4, calculating the sampling number of time of the sampler required by the sampling number of units in the step 2; 5, evaluating the confidence coefficient and deviation of the sampling number of units of total samples obtained by primary sampling by t-distribution; 6, performing secondary sampling by virtue of a reduction method and performing evaluation by t-distribution; and 7, performing a crushing and sample preparing operation. The method provided by the invention is suitable for gene engineering sampling detection of various grain crops (in particular edible grains and grains for reserving seeds for planting), risk control of the mixing proportion of different gene engineering crops, sampling occasions sutiable for demands on different confidence coefficients and deviations and detection cost management suitable for mixing risk control of gene engineering crop grains.

Description

technical field [0001] The invention relates to a detection sampling method for genetically engineered crops. Background technique [0002] The application of genetic engineering in crops is already widespread. At present, China's soybean imports have reached more than 80 million tons, and it is still growing. Other genetically engineered crops, such as wheat, rice, and rapeseed, have also been extensively planted and researched around the world, and have even been commercialized. The commercialization of genetically engineered crop seeds and grain and oil products is also thriving. Non-governmental genetically engineered crops and their products, such as rice, flour, oil, etc., as the staple food of countries all over the world, are entering the table of ordinary people. [0003] The safety of genetically engineered crops, or people's preference for genetically engineered crops, has always been controversial, and no matter how necessary the controversy is, after all, cont...

AI Technical Summary

Problems solved by technology

[0007] Every laboratory will face such a problem: even if the samples are taken according to the standard, since the amount of sampling at one time is tens or even hundreds of kilograms, while the amount of samples tested in the laboratory is only on the order of a few grams or even milligrams, in one time When the deviation brought by the sample is not yet clear, if the test conclusion obtained by selecting a few grams or a few milligrams from the sample obtained in one sampling can represent the whole, what is the confidence and deviation?

[0008] At present, there are still many ambiguities in the confidence and deviation management of the risk monitoring results of genetically engineered crop seed materials, and the main reason is that the errors and confidence introduced in the sampling process cannot be continuously controlled