目前氯霉素注射液含量测定方法按部颁［１］抗生素微生物检定法操作，但此法受培养基、菌种、温度、时间等的影响。笔者在实践过程中发现试验所致的抑菌圈易出现边缘模糊，造成卡尺测量上的误差，用抑菌圈测量仪测定，其结果的可信限率较高，同时，此法耗时耗力。本文采用... Currently chloramphenicol injection method according to ministerial [1] antibiotic microbial assay method, but this method by the medium, bacteria, temperature, time and other effects. In the course of practice, the author found that the bacteriostatic circle caused by the test is prone to fuzzy edges, resulting in errors in the measurement of the caliper, as measured by the bacteriostatic circle measuring instrument, and the result has a high credible limit rate. Meanwhile, this method consumes time-consuming force. This article uses ...