| abstract |
Methods and systems for determining the presence of one or more analytes in various types of matricies,such as foods, oils, biological fluids, etc. Membranes are used to remove extraneous matter (e.g., solid particles) and/or to bind specific interferents or analytes. Specific assays are provided for determining citric acid, total fat (or % fat), free fatty acids, protein content and specific nucleic acid content indicative of the presence of DNA and/or RNA of certain microbes (e.g., pathogens) or genetically altered substances (e.g., genetically engineered grain). |