The size of sample you will need to provide depends on which tests you request and we are happy to discuss your sampling and sample size requirements. Many of our tests require 10 g or less per test, but a few require more. Most importantly, be sure your sample is large enough to be representative of the product or ingredient you are testing. If you are sampling a bulk material (grains, premixes, powders, etc.) avoid taking a sub-sample from off of the top or bottom. Mix before sampling, if possible, and composite several small sub-samples. If you are sampling a packaged product, submit multiple packages selected at random from the batch to be tested. Proper sampling is the key to meaningful test results.