本文選題：亞硝酸鹽 + 頂空　； 參考：《食品與機(jī)械》2017年01期

【摘要】：對頂空—?dú)庀嗌V測定飲用水、煙筍、外婆菜和烤耳尖中亞硝酸含量進(jìn)行研究,建立亞硝酸鹽的快速、準(zhǔn)確、定量檢測方法,對該方法的反應(yīng)機(jī)理進(jìn)行推斷,并用頂空—?dú)赓|(zhì)聯(lián)用儀對反應(yīng)產(chǎn)物進(jìn)行驗(yàn)證。煙筍、外婆菜和烤耳尖經(jīng)粉碎、沸水提取、沉淀劑沉淀和過濾后,取樣品溶液分析,飲用水直接取樣分析。樣品處理液中先后加入環(huán)己基氨基磺酸鈉溶液和硫酸溶液,在頂空瓶中50℃條件下發(fā)生重氮化反應(yīng),以衍生產(chǎn)物環(huán)己烯作為目標(biāo)產(chǎn)物,定量分析。結(jié)果表明,低濃度標(biāo)準(zhǔn)物質(zhì)標(biāo)準(zhǔn)曲線r~2為0.999 0,取樣量為5 mL時,對應(yīng)的檢測范圍為0.001~0.200 mg/L;高濃度標(biāo)準(zhǔn)物質(zhì)標(biāo)準(zhǔn)曲線r~2為0.999 5,取樣量為3g時,對應(yīng)的檢測范圍為0.67~167.00mg/kg。該方法檢出限低,線性范圍寬,重復(fù)性和回收率好,是快速檢測食品中亞硝酸鹽較好的方法。
[Abstract]:The determination of nitrite in drinking water, bamboo shoots, grandmother vegetables and roasted ear tips by headspace gas chromatography was studied. The rapid, accurate and quantitative detection method of nitrite was established, and the reaction mechanism of the method was inferred. The reaction products were verified by headspace and GC-MS. Bamboo shoots, grandmother vegetables and roasted ear tips are crushed, extracted by boiling water, precipitated and filtered, sample solution is analyzed, drinking water is directly sampled and analyzed. Sodium cyclohexyl aminosulfonate and sulfuric acid were added to the sample treatment solution successively. Diazotization reaction took place at 50 鈩，

本文編號：2022599