Intelligent Whiteness Tester for Measuring the Color of Monosodium Glutamate

March 26 10:06:38, 2024

The processing precision of MSG influences the color of MSG, and the judgment of the quality of MSG is often based on whether the appearance of MSG is white or not. Therefore, whiteness is an index to comprehensively evaluate the purity of monosodium glutamate, and it is also an important quality evaluation item for quality management and evaluation. The monosodium glutamate's appearance requirements for monosodium glutamate product standards are as follows: white or almost white crystalline powder. The inaccuracy of the indicators, the human error of the visual inspection method, and the different identification conditions make the measurement results inaccurate, making it difficult for people to make correct and consistent judgments about product quality. The whiteness measurement method introduced in this paper is a physical measurement method. By measuring the reflectance of light, the whiteness of the sample is determined. The result is objective, quantitative, and consistent, reducing the human error. The whiteness of MSG can be accurately measured using a smart whiteness meter.

The smart whiteness tester found that the degree of pigmentation in MSG can be reflected from the whiteness and light transmittance. However, because the whiteness is the reflectance of the MSG solid particle at a wavelength of 452 nm, the light transmittance is Since the transmittance of the MSG aqueous solution to light having a wavelength of 420 nm was measured, the two were different, and both were quality indexes for evaluating the purity of the MSG.

The measurement of the smart whiteness tester found that the whiteness of the standard whiteness plate decreased with time, and that most of the standard whiteness plates had a certain degree of reflectance. However, it can also be made by yourself. The specific method is as follows: Burn special grade magnesium strips in a clean place, and move the plate holder (preferably with a plate holder precoated with special grade of magnesium oxide powder) over it, and the thickness of the smoked surface Must be more than 1mm, the plate holder smoked with magnesium peroxide is the standard white plate.

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