摘要
在香蕉果肉中Cr的初级形态分析过程中,引入体外消化模型进行预处理,采用SP220Z型原子吸收分光光度计测定Cr元素含量。结果表明:经过体外模型消化处理后可溶态和不溶态Cr含量分别为0.0036mg/100g和0.0163mg/100g;Cr溶解率和残留率分别为16.8498%和77.0932%,Cr主要以不溶态形式存在,说明香蕉经过体外消化后能沉淀一定的金属元素;Cr溶解率和残留率平行实验结果的RSD分别为2.1768%和1.9761%,引入体外消化模型,方法整体误差仅为6.0570%,表明在微量元素形态分析过程中引入体外消化模型可行。
Pretreatment of in vitro digestion model was applied to the analysis of primary speciation of Cr element in banana pulp using an SP220Z-type atomic absorption spectrometry. Results showed that the contents of dissolvable and undissolvable Cr species in banana pulp with in vitro digestion pretreatment were 0.0036mg/100g and 0.0163 mg/100 g, respectively; the dissolution and residual percentages of Cr were 16.8498% and 77.0932%, respectively, and Cr mainly existed in undissolvable state. This reveals that the element can be precipitated by in vitro digestion. The RSDs of replicate determinations for dissolution and residual percentages of Cr were 2.1768% and 1.9761%, respectively and the whole error of this method was only 6.0570%. Thus, in vitro digestion is applicable to speeiation analysis of mieroelements.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2009年第19期114-116,共3页
Food Science
基金
海南省自然科学基金项目(50890)
关键词
微量元素
体外消化模型
形态
microelement
in vitro digestion model
speciation
