多壁碳纳米管预浓缩后荧光光谱法测定l -色氨酸

E. Zolfonoun
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引用次数: 11

摘要

采用基于多壁碳纳米管(MWCNTs)的固相萃取法对l -色氨酸进行预富集,然后进行荧光光谱测定。由于MWCNTs的高表面积,仅需10 mg MWCNTs即可在5 min内获得满意的浓度因子和萃取回收率。研究了pH、吸附剂用量、洗脱液类型和时间对分析物回收率的影响。在最佳条件下,l -色氨酸的检出限为8.9 ng mL−1。通过分析10个重复得到的相对标准偏差,该方法的精密度为2.6%。用小麦和大麦样品检验了该方法的实用性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Spectrofluorometric determination of L-tryptophan after preconcentration using multi-walled carbon nanotubes
A solid-phase extraction method based on multi-walled carbon nanotubes (MWCNTs) was applied for the preconcentration of L-tryptophan prior to its spectrofluorometric determination. Due to the high surface area of MWCNTs, satisfactory concentration factor and extraction recovery can be achieved with only 10 mg MWCNTs in 5 min. The effects of pH, sorbent amount, eluent type and time on the recovery of the analyte were investigated. Under the optimum conditions, the detection limit for L-tryptophan was 8.9 ng mL−1. The precision of the method, evaluated as the relative standard deviation obtained by analyzing of 10 replicates, was 2.6%. The practical applicability of the developed method was examined using wheat and barley samples.
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