China Education Equipment Purchasing News: What is the importance of moisture determination in food? Why is moisture determination so important in food?
1. Moisture determination is one of the important quality indicators
A certain moisture content can maintain food quality and prolong food preservation. Various types of food have their own standards. Sometimes, if the moisture content exceeds or decreases by 1%, both the quality and the economic benefit play a big role. For example, milk powder requires a moisture of 3.0 to 5.0%. If it is 4 to 6%, that is, if the moisture is increased to more than 3.5%, the milk powder will agglomerate, and the commodity value will be low. After the moisture is increased, the milk powder is easy to change color and the storage period is reduced In addition, some foods are too high in moisture, the tissue state softens, and the elasticity also decreases or disappears.
Vegetables have a water content of 85 to 91%, fruits 80 to 90%, fish 67 to 81%, eggs 73 to 75%, milk 87 to 89%, and pork 43 to 59%. In terms of water content, the water content of the food affects the flavor, spoilage and mold of the food. At the same time, many physical properties will change after the dried food and moisture absorption, such as the hardening of bread and biscuits is not only Loss of water and drying, but also the result of changes in starch structure due to changes in moisture. In addition, in meat processing, the taste of sausages is very closely related to the situation of water absorption and water holding. Therefore, the moisture content of food is Freshness, hardness, fluidity, taste, preservation, processability and many other aspects have a very important relationship.
2. It is an important economic indicator
Food factories can perform material balance calculations based on the moisture content of raw materials. For example, if the fresh milk has a water content of 87.5%, how much milk is required to produce a ton of milk powder (7: 1 milk powder rate) when producing milk powder with this milk (2.5% water content). Similar material balances like this can be done on the basis of moisture determination. This can also guide the production management. Another example is how many pounds of water is needed to produce 100 pounds of bread, if the material balance is first calculated. The toughness of the dough is related to moisture. If the amount of water is more, the dough is softer, and when the amount of water is less, the dough is harder. The bread volume is not large, which affects the economic benefits.
3. The water content is closely related to the growth of microorganisms and biochemical reactions.
Under normal circumstances, it is necessary to control the water lower to prevent the growth of microorganisms, but it is not that the lower the water, the better. Generally, the action of microorganisms is stronger than that of biochemistry. From the above three points, the importance of measuring moisture can be explained. Moisture is an indispensable item in our food analysis.
Moisture analyzer, designed using the principle of pyrolysis weight, is a new type of rapid moisture detection instrument. While the moisture analyzer measures the weight of the sample, the infrared heating unit and the moisture evaporation channel quickly dry the sample. During the drying process, the moisture meter continuously measures and instantly displays the moisture content% of the sample. After the drying process is completed, the ultimate moisture content is determined. The value is locked and displayed. Compared with the international oven heating method, infrared heating can reach the maximum heating power in the shortest time, the sample is quickly dried at high temperature, and the test result has good consistency with the national standard oven method, has replaceability, and the detection efficiency is far higher For the oven method. General samples can be measured in just a few minutes.
The instrument is easy to operate and the test is correct. The display part uses a red digital tube. The display value is clearly visible. It can display moisture value, sample initial value, final value, measurement time, temperature initial value, final value and other data. , Printer connection function.
The moisture meter can be widely used in all industries that need to quickly determine moisture, such as medicine, food, feed, seeds, rapeseed, dehydrated vegetables, tobacco, chemicals, tea, food, meat and textile, agriculture and forestry, paper, rubber, plastic , In the laboratories and production processes in textile and other industries.
Features:
1. Small size, light weight,
2. The detection speed is fast and correct
3. Simple operation and correct test
4. The display part adopts red digital tube display
5. Widely used
5. With the function of connecting with computers and printers
Product Technical Index:
Weighing range: (generally) 0-20g (specific requirements) 0-100g
Weighing minimum reading: 0.001g
Sample quality: 0.5-20g
Heating temperature range: room temperature-160 ℃
Moisture content readability: 0.01%
Display parameters: 7 types
Communication interface: RS232
Dimensions: 380 × 205 × 325 (mm)
Power: 270W (working); 20W (standby)
Power supply: 220V ± 10%
Frequency: 50Hz ± 1Hz
Net weight: 3.7Kg
(Xie Yinan / Editor)
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