摘要
建立一种食品包装袋中可浸出有机物质总量的新型分析方法。以食品塑料袋为样品,经超声波浸提后,用微波压力密闭快速消解浸提液,利用鲁米诺-过氧化氢-铬偶合流动注射化学发光体系进行测定。结果表明:有机物相当于铬(Ⅲ)的线性范围为1.154×10-10～1.154×10-5mol/L(1/3Cr3+),铬(Ⅲ)检出限为4.476×10-11mol/L(1/3Cr3+),RSD为3.1%(n=3)。该法灵敏度高,操作简便、测定快速、成本低廉,利于普及推广。
The aim of the present study was to develop a novel analytical method for rapidly determining total organic matter in food plastic bag using flow injection coupled with chemiluminescence. Samples received ultrasonic-assisted extraction and subsequent microwave pressure digestion prior to the analysis with luminol-H2O2-Cr3＋ flow injection chemiluminescence system. Chromium （Ⅲ） （considered equivalent to total organic matter） displayed a linear range of 1.154×10-10 to 1.154×10-5 mol/L （1/3Cr3＋） and a detection limit of 4.476 × 10-11 mol/L （1/3Cr3＋）,with a relative standard deviation （RSD） of 3.1% （n = 3）. The proposed method is characterized by high sensitivity,ease of operation,rapid determination and low cost. All these figures of merits benefit its promotion and popularization.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2010年第20期367-370,共4页
Food Science
基金
河南省重点学科建设项目(10466-X-082301)
