Bacteria Rejection Test



Laboratory Equipment


Lenge Purification Equipment Co., Ltd. and Jiangnan University established the Institute of materials and technology, and the graduate-student workstation. With advanced imported test equipment, standard test procedures and testing proposals, we can provide customers with various test and validation services, such as chemical compatibility, extractables, adsorption, bacterial challenge, bacterial viability, integrity, recycle use, etc.

For different customers, we simulate the produce process under the most disadvantage conditions, and make qualitative and quantitative estimation of dissolution by imported infrared spectrometer, ultraviolet spectrophotometer, HPLC and other equipment, thus make the quantitative analysis of the product absorbed on the membrane.


The evidence shows that the filtration process can continue to remove high levels of standard bacterial or related microbial contamination of the product or substitute liquid suspended under the simulated process conditions.

Principle and method selection

Sterilized filter means each centimeter of effective filtration area of the filter can trap 107CFU brevundimonas bullata (ATCC19146) under specified technology. Although there’s unified bacteria-intercepted standard for air filter, due to the liquid bacteria challenge regards as the “worst condition” of the air filter, it is widely accepted referring the liquid filter’s test.

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