Grain filter for screening and determination of rice impurities

The impurities in rice have an impact on the safe storage, food value, and human health of rice. Therefore, the standard has strict restrictions on impurities. In general, all types of rice have restrictions on the total amount of impurities, but the total amount (%) is not simply the sum of the test results for each sub-item. Even if a percentage of the total amount of food impurities (%) is qualified, it is unqualified if its sub-item impurities exceed the regulatory limit. vice versa.

In rice, the most restrictive type of impurities for children is rice. For example, rice provides powder, minerals, crusts, and rice grains; millet only specifies minerals and grains; glutinous rice provides minerals. And high oyster shell; glutinous rice, ribbed rice provides minerals, wolfberry, wolfberry grains and so on.

However, the specific operations performed by the grain filter for screening powders, minerals, and other impurities are:

1. Powder:

1 Take a sample: From the average sample, take a sample of about 200g;

2 Screening: Intensify the 1.0mm round-hole sieve in two times and screen according to the prescribed screening method. Pour out the sample and pat the sieve so that the powder falls into the bottom of the sieve layer.

3 Weighing: After all the samples have been sieved, the yttrium powder remaining on the sieve layer under the brush is weighed together with the sieved material.

2. Minerals: Minerals are weighed out of samples that have been inspected.

3. Other impurities: In the samples that have been tested for tantalum powder and minerals, the rice grains, grains, and other impurities are weighed together.

According to the results obtained from the calculation formulas, the allowed difference of the measured results is not more than 0.04%. The average value is the result of the test. The test result is taken after the decimal point. According to the results, it can be assessed whether the impurities in rice are up to standard.