Nitrosamine ndi imodzi mwazinthu zitatu zodziwika bwino padziko lapansi, zina ziwiri ndi aflatoxins ndi benzo[a]pyrene.Nitrosamine imapangidwa ndi nitrite ndi amine yachiwiri mu mapuloteni ndipo imafalitsidwa kwambiri mu chilengedwe.Zomwe zili mu nitrosamine mu nsomba zamchere, shrimps zouma, mowa, nyama yankhumba ndi soseji ndizokwera kwambiri.Kuyika nthawi yayitali yodzaza nyama ndi masamba kungathenso kupanga nitrite. .Nitrite ndi nitrate ndi mchere wodziwika bwino muzakudya zatsiku ndi tsiku ndi madzi akumwa.Nthawi zambiri amakhulupirira kuti kudya kwambiri zinthuzi kungayambitse methemoglobinemia ndikutulutsa carcinogenic nitrosamines m'thupi.Nitrate ndi nitrite ndi zoipitsa za ionic mu GB 2762-2017 zotchedwa "National Food Safety Standard -Limit of pollunt in food".GB 5009.33-2016 yotchedwa "National Food Safety Standards for the Determination of Nitrite and Nitrate in Food" ndiyo kulinganiza kutsimikiza kwa zinthu ziwirizi, ndi ion chromatography monga njira yoyamba ikuphatikizidwa muyeso.
Zitsanzozo zimapangidwira molingana ndi GB/T 5009.33, ndipo pambuyo pa mpweya wa mapuloteni ndi kuchotsa mafuta, zitsanzozo zimachotsedwa ndikuyeretsedwa ndi njira zofananira.Pogwiritsa ntchito CIC-D160 ion chromatograph, SH-AC-5 anion column, 10.0 mM NaOH eluent ndi bipolar pulse conductance njira, pansi pa chromatographic yovomerezeka, chromatogram ili motere.
Nthawi yotumiza: Apr-18-2023