How to test the color of soy sauce? Precise application of benchtop liquid colorimeter

In the food industry, soy sauce as a common and important condiment, its quality and appearance characteristics have attracted much attention. Among them, chroma is a key indicator to measure the quality of soy sauce, which not only affects the visual perception of consumers, but also reflects the production process and quality stability of soy sauce to a certain extent. So, how to accurately detect the color of soy sauce? Benchtop liquid colorimeters provide us with a precise and efficient solution.

The color of soy sauce is mainly derived from a series of chemical reactions that occur during the brewing process, including the Maillard reaction and the caramel reaction. Under normal circumstances, high-quality soy sauce should show a brown or reddish-brown, bright and uniform color. However, if there is a deviation in color, it may indicate an anomaly in the production process, such as raw material quality problems, improper fermentation conditions or unreasonable use of additives. In addition, for consumers, the color of soy sauce will also affect their purchase decisions and judgments on product quality.

Traditional soy sauce chroma detection methods often rely on artificial visual evaluation, which is subjective and easy to be affected by environmental light, observer experience and emotion, resulting in poor accuracy and repeatability of results. In order to overcome the limitations of traditional visual colorimetry, modern instrument detection methods have been widely used. Among them, the bench liquid colorimeter, as a special instrument for measuring liquid colorimetry, has the advantages of fast, accurate and good repeatability, and plays an important role in the detection of soy sauce colorimetry.

DS-812N/DS-816N Desktop colorimeter is a high precision desktop colorimeter specially built for liquid colorimeter. It can measure up to more than 30 chroma indicators, including the platinum Cobalt index, Gardner, Sayport and Chinese, US, European pharmacopoeia standards. The instrument uses intelligent zero-point calibration technology, which takes only 1.5 seconds for a single measurement, and has powerful data storage capacity, which can hold more than 100,000 data. Its wide range of applications, excellent performance in the food industry, suitable for the detection of soy sauce color.

Table liquid colorimeter test procedure
1. Sample preparation: Prepare the soy sauce sample and clean container to be tested. The container should be cleaned and wiped clean before use to ensure that there are no impurities and bubbles. Pour the soy sauce into the container, taking care to remove bubbles as much as possible so as not to affect the measurement results.

2. Instrument calibration: After starting up, black and white calibration is performed to ensure the accuracy and reliability of the instrument measurement results.

3. Place the sample: Exit the calibration page and place the prepared soy sauce sample in the measurement position to ensure that the sample is placed stably and avoid light leakage affecting the result.

4. Measurement and preservation: press the measurement key to measure and save the sample data as the standard sample value. After the standard sample measurement is completed, the sample measurement method is consistent with the standard sample. After the measurement is completed, the sample data are compared to visually observe whether there is a color difference in soy sauce.

The advantage of precise application
1. High accuracy: The standard deviation of the spectral reflectance and transmittance of the desktop liquid colorimeter is extremely low, which can accurately quantify the color data of soy sauce and meet the requirements of manufacturers for the measurement of soy sauce color difference.

2. High repeatability: The instrument has a high degree of repeatability, and can maintain stable measurement results even when the environment changes, improving the reliability of the test results.

3. Intelligent operation: Some advanced desktop liquid colorimeters also have intelligent functions, such as automatic sample identification, automatic measurement and analysis of data, which greatly improves work efficiency and measurement accuracy.

The application of benchtop liquid colorimeter in soy sauce colorimetry provides a powerful quality control tool for soy sauce production enterprises. By accurately measuring the color of soy sauce, enterprises can better ensure the stability and consistency of product quality, meet the needs of consumers for high-quality soy sauce, and enhance their competitiveness in the market.