rice
of
freshness
detect

Why test the freshness of rice?
 

    
大米在贮藏过程中因环境和微生物的作用，become stale
In addition to the gradual deterioration of the taste, it will also produce some toxic and harmful substances, such as peroxides, carcinogens, aflatoxins, etc
，
Therefore, the detection of rice freshness is very meaningful
。

What is the detection principle?
 

Rice gradually oxidizes with the extension of storage time, increasing the amount of free fatty acids contained.
The pH value decreases accordingly. Acid-base indicators can be used to identify the freshness of rice.

How to detect it?
 

l
Remove all items from the test kit.

l
Take a small cup of rice, add the rice to the tube to be tested with a small spoon, and add it all the way to the small tube.
1.0 tick mark
；

l
Unscrew the green bottle cap of the potion and drop all the potions into the detection tube.
，
Close the lid and shake it
Observe the color
Change.

l
Compare with the color card,
green
Express fresh rice
，
Orange or yellow?
show
Stale big
rice
。

Precautions

l
All items in the test kit are not edible.

l
test package
all
Potion
Avoid contact with skin. In case of accidental contact, rinse immediately with plenty of water.

The final test results are for reference only
，
accurate
The results are subject to relevant national standards and methods.

test
Bao Qing
single
（
Can be measured
2 times
）

2 bottles of potions; 2 sample cups; 1 plastic spoon;
1 color card