Silica nanolayer coated capillary by hydrothermal sol–gel process for amines separation and detection of tyramine in food products oleh Apinya Obma, Pattamaporn Hemwech, Sittisak Phoolpho, Rawiwan Bumrungpuech, Supa Wirasate, Sulawan Kaowphong, Prapin Wilairat, Rattikan Chantiwas