Comparison of Membrane Filtration Rates and Hydrophobic Grid Membrane Filter Coliform and Escherichia coli Counts in Food Suspensions Using Paddle-Type and Pulsifier Sample Preparation Procedures
Abstract:Food suspensions prepared by Pulsifier contained less debris and filtered 1.3× to 12× faster through hydrophobic grid membrane filters (HGMFs) than those prepared by Stomacher 400. Coliform and Escherichia coli counts made by an HGMF method yielded 84 and 36 paired samples, respectively, positive by both suspending methods. Overall counts of pulsificates and stomachates did not differ significantly for either analysis, though coliform counts by Pulsifier were significantly higher in mushrooms and significantly lower in ground pork (P = 0.05). Regression equations for log10 counts of coliform and E. coli by Pulsifier and Stomacher were: Pulsifier = 0.12 + 0.97 × Stomacher, and Pulsifier = 0.01 + 1.01 × Stomacher, respectively.
Document Type: Short Communication
Publication date: 2000-01-01
More about this publication?
- The Journal of Food Protection has moved to a new website. Please use http://jfoodprotection.org to access the Journal of Food Protection and Journal of Milk & Food Technology content on the new JFP site. Content on the IngentaConnect website will not be available after December 31, 2016.
- Information for Authors
- Submit a Paper
- Subscribe to this Title
- Membership Information
- Information for Advertisers
- Ingenta Connect is not responsible for the content or availability of external websites