Non volatile acid (calculated as lactic acid) detection

3 Instruments and tools 3.1 Balance: sensitivity 0.01 g · 0.1 g · 1 g. 3.2 Grain screening. 3.3 Electric filter. 3.4 Splitter or sample plate. 3.5 Analysis disk, tweezers, etc. 4. Lighting requirements: During the operation process, the lighting conditions should comply with the requirements of GB/T 22505. 5. Sample preparation: There are two types of samples for impurity detection: large sample and small sample. The large sample is used to detect impurities in the large sample, including large impurities on the upper sieve and impurities under the lower sieve; A small sample is a small sample separated from a sample that has been tested for impurities in a large sample, and used to test for impurities similar in size to grains, incomplete grains, etc. According to the provisions of GB/T 5491, divide the samples to the sample mass specified in Table 1

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BAIJIAN testing process:

1. Telephone communication and confirmation of requirements

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6. If urgent or priority processing is required

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