本文關(guān)鍵詞： 食用油 微乳液 石墨爐原子吸收光譜法 鉻　出處：《食品研究與開發(fā)》2017年24期 　論文類型：期刊論文

【摘要】：建立微乳液直接進(jìn)樣-石墨爐原子吸收光譜法(graphite furnace atomic absorption spectrophotometry,GFAAS)測定食用油中鉻的方法,研究微乳液的形成條件以及基體改進(jìn)劑對測定結(jié)果的影響,優(yōu)化石墨爐原子吸收光譜儀的升溫程序,通過與微波消解處理樣品的檢測結(jié)果進(jìn)行對比,驗(yàn)證方法的準(zhǔn)確性。研究結(jié)果表明:按質(zhì)量分?jǐn)?shù)為15%食用油,6%水相,20%曲拉通X-100和59%正丁醇能配制成穩(wěn)定的微乳液。不需要添加基體改進(jìn)劑,儀器最佳檢測條件為預(yù)灰化溫度800℃、灰化溫度1 400℃、原子化溫度2 300℃。在此條件下,試驗(yàn)相對標(biāo)準(zhǔn)偏差5%,檢出限為0.211 ng/m L,加標(biāo)回收率在90%到110%之間,并與微波消解法處理樣品的測量結(jié)果相近。該方法簡單,準(zhǔn)確,實(shí)用性強(qiáng),并適用于大量食用油樣品的測量。
[Abstract]:A method for the determination of chromium in edible oil by graphite furnace atomic absorption GFAAS-graphite furnace atomic absorption spectrometry was established. The formation conditions of microemulsion and the effect of matrix modifier on the determination results were studied. The temperature program of graphite furnace atomic absorption spectrometer was optimized and compared with the results of microwave digestion. The results show that the stable microemulsions can be prepared with 20% traxonium X-100 and 59% n-butanol at the mass fraction of 15%% water, and no matrix modifier is needed. The optimum detection conditions are as follows: preashing temperature 800 鈩，

本文編號：1510568