Melamine Screen Kit (Milk), Dipstick, 50 tests
The Melamine Strip Test is a rapid immunochromatographic test designed solely for use in the qualitative screening of Melamine in milk at ≥ 250 ppb. Animal feed and other contaminated samples can be tested using the Melamine Feed Strip Test (PN 50005SF). For milk samples, a dilution is performed prior to analysis using the sample buffer provided. The Melamine Strip Test provides only preliminary qualitative test results. Samples requiring regulatory action should be confirmed by ELISA, HPLC or other conventional methods. The test is based on the specific immuno-chemical reaction between an antigen and an antibody. Melamine, if present in a sample, will compete with a melamine conjugate immobilized on the dipstick membrane (test line) for the antibody binding sites of anti melamine antibodies coupled to gold nanoparticles. If Melamine is present in a sample at a quantity above the limit of detection, it will saturate the antibody binding sites, preventing the antibody from binding with the melamine conjugate immobilized on the test line. Consequently, a test line which is lighter than the control line (or no test line) will occur, indicating a positive result. Conversely, if there is no Melamine present (or Melamine is present below the limit of detection of the test), a test line of equal or greater intensity to the control line will be generated. The control line is not influenced by the presence or absence of Melamine in the sample, as it is produced by a different antibody/antigen reaction, and therefore should be present in all reactions.