Objective To reduce infection risk in hemodialysis patients through analyzing the causes of over stand-ard colony forming unit(CFU)and conducting bacteriological detection of hemodialysis concentrated B solution. Methods According to microbial monitoring results of hemodialysis concentrate B solution in a hospital between November 2011 and May 2012,disinfection frequency of B solution was changed and dispensing container was covered during the process of using,four groups were divided according to different measures (group A disinfected twice a week,covered dur-ing the process of using;group B twice a week;group C once a week;group D once every two weeks),monthly bacte-riological detection of B solution was conducted,condition before and after disinfection of four groups were com-pared.Results Bacterial count in group A,B ,C and D was(25.41 ±15.08),(28.24±28.04),(68.58 ±22.58), and (75.25±26.63)CFU/mL,respectively (F =79.00,P <0.01 );bacterial count of group A,B,and C after in-tervention were all lower than group D before intervention (all P <0.01),bacterial count of group A and B was the lowest.The qualified rate of group A was 100.00%,the unqualified rate of group B,C,and D was 13.95%, 24.24%,and 35.94% respectively(χ2 =28.70,P <0.01 ),the unqualified rates of group A,B,and C after inter-vention were all lower than group D.Conclusion Hemodialysis concentrated B solution should be used within 24 hours after preparing,disinfected twice a week,and covered during the process of using ,so as to control B solution colony number within the standard level.

AIM: To establish the method of determining peoniflorin,ferulic acid and icariin in Bushen Huoxue Granule(Herba Epimedii,Radix Angelicae Sinensis,Radix Paeoniae Alba,etc.).METHODS: HPLC-DAD was used to determine peoniflorin,ferulic acid and icariin.The samples were separated on Alltima C18(5 ?m,250 mm ? 4.6 mm) with mobile phase consisted of methanol-0.1% phosphoric acid(gradient elution).RESULTS: The average recoveries of peoniflorin,ferulic acid and icariin were 96.7%,97.5%,99.6% and RSD were 1.37%,3.13%,0.96%.respectively.The peoniflorin,ferulic acid and icariin samples showed a good relationship in the ranges of 0.318-3.970 ?g,0.096-1.200 ?g,0.414-5.175 ?g in the chosen HPLC condition.CONCLUSION: The method is simple,accurate and reproducible and can be used for the quality control of granule.