Ask the expert to solve several difficult problems in the detection of crude fiber in feed.

Question 1. Sulfuric acid concentration: some data require a concentration of 0.255 moles per liter and some 0.128 moles per liter. Which is correct? And why is the concentration of sulfuric acid and sodium hydroxide used to digest the sample so accurate and calibrated? Question 2, what kind of device is the digestion furnace, and what are the requirements for temperature control in the acid-base digestion process? Is it possible to use a digestive device for measuring crude protein? Who has a picture of the cooker? Question 3. Where can I find the video of crude fiber detection?