BS ISO 22186:2020 pdf free.Milk and mil k products一Determination of nitrofurazone.
BS ISO 22186 Sampling is not part of the method specified in this document.It is important that the laboratory receives a sample that is representative and has not been damaged
or changed during transport or storage. Powdered samples shall be homogenized before taking test portions. Transfer the whole sample into a container of capacity about twice that of the laboratory sample volume. Close the container immediately.Mix thoroughly by repeatedly shaking and inverting the container. Alternatively, mix well the powdered laboratory sample directly into its original container by means of a spoon before taking a test portion.Due to slight differences between LC- MS/MS instruments, even of the same model from the same manufacturer, slight modifications to the conditions listed below may be necessary to achieve optimal performances. Operating the chromatographic system with different conditions (including different temperatures, with a different column type, or other differing conditions) will not necessarily result in false or less sensitive results, but will require that any effects of such changes be thoroughly validated.For the range 0,1 ng/g to 5 ng/g of nitrofurazone, and irrespective of the type of dairy product matrices described in Annex B, on 95 % of occasions the difference between two independent single test results,obtained using the same method on identical test material in the same laboratory by the same operator using the same equipment within a short interval of time, are expected to agree within 13 % and 16 % of their average, by the external calibration approach and matrix- matched calibration approach,respectively. These values correspond to the relative repeatability limits, r, at 95 % confidence levels,obtained from linear fittings of Sr with concentration from all nitrofurazone levels and all dairy product matrices described in Annex B.whether there were any deviations from the procedure; whether there were any unusual features observed during the analysis; details of any incident that could have influenced the test result(s); the date of the test.BS ISO 22186 pdf downlaod.