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Impedance Method for Rapid Detection of Total Counts of Bacteria and Fungi in Bottled Purified Water

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Abstract:

A study was conducted to compare the current conventional method and the impedance method for rapid detection of total counts of bacteria and fungi in bottled purified water. The results indicated that the corresponding detection rate for the 2 methods was 94.5 and 90.4%, respectively. The detection time was shortened from 48 h (bacteria) and 5 days (fungi) to 14.5 and 44 h, respectively. Moreover, for more serious contamination, less time was needed. The impedance method predicted a positive sample within 11.3 h (bacteria) and 27.1 h (fungi). Therefore, the impedance method was found to be a rapid, accurate method.

Document Type: Research Article

Affiliations: Centers for Disease Control and Prevention, Guang Dong Province, No.176 Xingang Rd West, Guangzhou, People's Republic of China 510300

Publication date: July 1, 2003

More about this publication?
  • The Journal of AOAC INTERNATIONAL publishes refereed papers and reviews in the fields of chemical, biological and toxicological analytical chemistry for the purpose of showcasing the most precise, accurate and sensitive methods for analysis of foods, food additives, supplements and contaminants, cosmetics, drugs, toxins, hazardous substances, pesticides, feeds, fertilizers and the environment available at that point in time. The scope of the Journal includes unpublished original research describing new analytical methods, techniques and applications; improved approaches to sampling, both in the field and the laboratory; better methods of preparing samples for analysis; collaborative studies substantiating the performance of a given method; statistical techniques for evaluating data. The Journal will also publish other articles of general interest to its audience, e.g., technical communications; cautionary notes; comments on techniques, apparatus, and reagents.
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