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Title
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Determination of L-cysteine Based on its Potentiometric Effect on a Belousov-Zhabotinskii Oscillating Chemical Reaction,
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Type
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JournalPaper
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Keywords
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L-cysteine, Belousov-Zhabotinskii (BZ) reaction, oscillating chemical reaction, potentiometric, statistical experimental design, Box-Behnken design
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Abstract
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Here, a simple and convenient method with suitable selectivity and high sensitivity for the determination of L-cysteine based on Belousov-Zhabotinskii (B-Z) oscillating chemical reaction is presented. The addition of L-cysteine to the oscillating system increased the oscillating period. This increasing in oscillating period is used as the analytical signal for determination of L-cysteine. The optimum conditions for the determination of L-cysteine were also investigated through a three-level Box-Behnken design. The analytical signal was linearly proportional to the logarithm of the L-cysteine concentration over the range of 4.0 × 10 -7 to 3.0 × 10 -5 M under optimum conditions. The detection limit was estimated 4.0 × 10 -7 M and relative standard deviation (RSD) for five measurements of 5.0 × 10 -6 M L-cysteine was 3.4٪.
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Researchers
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Akramsadat Hamidi (Fifth Researcher), Farideh Sakhavi (Fourth Researcher), Reza Ojani (Third Researcher), Abolfazl Kiani (Second Researcher), Jahan Bakhsh Raoof (First Researcher)
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