Validation of Microbial Limit Method of HQ841 Hydrogel Resin Powder

OBJECTIVE To establish a method for the microbial limit test of HQ841 hydrogel resin powder. METHODS The sample preparation of 1∶20 solution, bacteria, yeast and mold counts the number of inspection and control bacteria by conventional method (Pseudomonas aeruginosa, Staphylococcus aureus) examination. RESULTS In the parallel test of 3 independent, verification test bacteria, yeast and mold count number check method, 5 strains of tested bacteria recovery rate was >70%. The control bacteria examination determination, Pseudomonas aeruginosa and Staphylococcus aureus, the test group were detected bacteria, negative group are sterile growth, Gram-negative bacteria in the control group had no growth. CONCLUSION The method can be used in microbial limit test of HQ841 hydrogel resin powder.