Weight about 1g sample which has been dried to the constant weight. Put the sample in a **0ml of conical flask, add *0mL of water to resolve, shake equally, filter, heat the sample at *0°C for *5 minutes. Shake the solution in the vibrator for *0 minutes, with the aid of water. Filter it and exactly take *5ml of the filtrate to a **0ml beaker, add 3mL of **0g/L NaOH solution, heat it on an electric cooker until boiling about 5 minutes, cooling it. Then follow the step of liquid test.

Content of Choline Chloride =(m*-m1)/m0×3.***5×**0%
m0——the weight of sample, g;
m2——the weight of sample and crucible filter;
m1——the weight of crucible filter.

6. Choline chlorid Usage:
Recommended usage on basis of Choline Chlorid *0% vegetable carrier (gram/mt feed)

1. pig:**0~**0
2. Rabbit:***0~***0
3. Cold water fishes:***0~***0
4. Warm water fishes:**0~**0
5. Shrimp:**0~***0
6. Meat chicken: **0~**0
7. laying hen:**0~**0