Spectrofluorometric determination of L-tryptophan after preconcentration using multi-walled carbon nanotubes
Publish Year: 1398
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_AMECJ-2-1_004
تاریخ نمایه سازی: 3 اسفند 1398
Abstract:
A solid-phase extraction method based on multi-walled carbon nanotubes (MWCNTs) was applied for the preconcentration of L-tryptophan (α-amino acid) 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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Authors
Ehsan Zolfonoun
Material and Nuclear Fuel Research school, Nuclear Science and Technology Research Institute, Tehran, Iran