果糖
分子印迹聚合物
化学
色谱法
糖
萃取(化学)
乳糖
食品科学
麦芽糖
品味
选择性
样品制备
蔗糖
生物化学
催化作用
作者
Hawa W. Mukami,Bareki S. Batlokwa
出处
期刊:Molecular Imprinting
[De Gruyter]
日期:2018-09-01
卷期号:5 (1): 16-24
被引量:2
标识
DOI:10.1515/molim-2018-0001
摘要
Abstract This article presents a novel sample preparation strategy that employed a custom-synthesized glucose - fructose (G-F) specific molecularly imprinted polymer (MIP) powder as an adsorbent for the simultaneous and selective extraction, isolation and pre-concentration of total glucose and fructose from the complex and `dirty` sample matrix of ‘100%’ fruit juices purchased from retail shops in Palapye, Botswana. The prepared G-F MIP powder demonstrated high selectivity, effective extraction and isolation for glucose and fructose from real samples of `100%` fruit juice samples as evidenced by the calculated high extraction efficiencies (EEs) of over 90%, with low percentage relative standard deviations (%RSD) of below 7% for n=6, for both glucose and fructose when compared to the low EEs of below 25% by the non-imprinted polymer (NIP), regarded as the control. Furthermore, the G-F MIP showed lower selectivity towards the analogous molecules; maltose and lactose as supported by the low EEs of below 31%. With the high affinity for glucose and fructose, the selective sample preparation strategy proposed herein presented itself as a potential procedure to be employed to improve the accurate analysis of adulterated artificial sugar sweeteners that are usually illegally added to the so-called `100%` fruit juices by producers to improve their taste.
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