Specificity- specific to analytical substance7. International official method– AOAC, AOCS, AACC The AOAC International, the Official Methods of Analysis,19th Edition, 2012 The American Association of Cereal Chemistry (AACC) The American Oil Chemists Society (AOCS) ISO 17025 Laboratory Standards8. Interferences สารอ่ืนท่ีรบกวนการวิเคราะห์ เช่น NaCl, lipid, ethanol etc.