Method for detecting amino acid content in grains using terahertz frequency domain spectroscopy
A spectral technology and terahertz time-domain technology, applied in the field of food component detection, can solve problems such as impenetrability, weak absorption intensity, and spectral peak width, and achieve unbiased evaluation, avoid errors, and have the effect of analyzing results
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[0038] This embodiment provides a method for detecting the content of L-glutamic acid in grains using terahertz frequency domain spectroscopy. Wherein, after adding known amount of L-glutamic acid (purchased from Sigma Company) to rice powder (provided by Zhangjiakou City Inspection and Quarantine Bureau, Hebei Province), the grain samples to be tested with different L-glutamic acid concentrations were prepared, and the The grain sample to be tested adopts the method of the present invention to detect and analyze as a blind sample, and the specific steps are as follows:
[0039] (1) Put the rice into a pulverizer to pulverize it, sieve it after grinding (100 mesh, particle size≤150 μm), put it into an oven and dry it to obtain dry rice powder; mix the rice powder with L-glutamic acid The powders are mixed according to different mass ratios, transferred to an agate mortar and further ground to obtain the fine powder of the mixed sample to be tested, wherein the mass percentage ...
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