Nitrosamine chimwe chezvitatu zvinozivikanwa zvikuru zvinokonzeresa kenza pasi rose, mamwe maviri maaflatoxins uye benzo[a]pyrene.Nitrosamine inoumbwa ne nitrite uye yechipiri amine muprotein uye inoparadzirwa zvakanyanya muzvisikwa.Zviri mu nitrosamine muhove dzine munyu, shrimps dzakaomeswa, doro, bhakoni uye soseji zvakakwirira.Kurebesa kuisa nguva yekuzadza nyama nemiriwo kunogonawo kubudisa nitrite. .Nitrite nenitrate ndiwo munyu wakajairika mukudya kwezuva nezuva uye mumvura yekunwa.Inowanzotendwa kuti kunyanyisa kutora zvinhu izvi kunogona kutungamirira kumethemoglobinemia uye kuburitsa carcinogenic nitrosamines mumuviri.Nitrate uye nitrite ndiyo ionic inosvibisa muGB 2762-2017 inonzi "National Food Safety Standard -Limit yezvinosvibisa muchikafu".GB 5009.33-2016 inonzi "National Food Safety Standards for the Determination of Nitrite and Nitrate in Food" ndeyekumisa kugadzwa kwezvinhu zviviri izvi, uye ion chromatography senzira yekutanga inosanganisirwa muyero.
Iwo masampula anotaridzwa zvinoenderana neGB/T 5009.33, uye mushure mekunaya kweprotein uye kubviswa kwemafuta, masampuli anotorwa nekucheneswa nenzira dzinoenderana.Uchishandisa CIC-D160 ion chromatograph, SH-AC-5 anion column, 10.0 mM NaOH eluent uye bipolar pulse conductance method, pasi pezvinokurudzirwa chromatographic mamiriro, chromatogram ndeyotevera.
Nguva yekutumira: Kubvumbi-18-2023