Material Analysis
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Bacterial Degradation of CMC Solution
Problem Phenomenon
Viscosity of CMC solution decreases by 30% after 3 days of storage
Cause Analysis
CMC is a natural polysaccharide and is easily degraded by bacteria; solution preparation utensils are not thoroughly disinfected
Solution
1)Thoroughly disinfect solution preparation utensils; 2)Add 0.01wt% preservative (sodium benzoate); 3)Refrigerate at 4°C after preparation; 4)Shorten use time to no more than 24h
Key Takeaway
CMC aqueous solution is easily degraded by bacteria and needs preservation and refrigeration
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