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simultaneous determination of amaranth and nitrite in foodstuffs via electrochemical sensor based on carbon paste electrode modified with cuo/swcnts and room temperature ionic liquid
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نویسنده
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bijad majede ,karimi-maleh hassan ,farsi mohammad ,shahidi seyed-ahmad
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منبع
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food analytical methods - 2017 - دوره : 10 - شماره : 11 - صفحه:3773 -3780
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چکیده
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A carbon paste electrode modified with 1-methyl-3-butylimidazolium bromide and cuo decorated single-wall carbon nanotubes (1-m-3-bibr/cuo/swcnts/cpe) was utilized for nanomolar determination of amaranth in the presence of nitrite using square wave voltammetric (swv) method. the structure of cuo/swcnts was investigated by sem method. 1-m-3-bibr/cuo/swcnts/cpe exhibited an enhancement in electro-oxidation current and active surface area. also, 1-m-3-bibr/cuo/swcnts/cpe exhibited indicated high catalytic activity toward the electro-oxidation of amaranth and simultaneous determination of it in the presence of nitrite. the 1-m-3-bibr/cuo/swcnts/cpe achieved dynamic ranges 0.004–750 μm and 1.0–10,000 μm between the oxidation currents and the concentration of amaranth and nitrite, respectively. we obtained the detection limit of 1.0 nm and 0.5 μm for amaranth and nitrite, respectively. the 1-m-3-bibr/cuo/swcnts/cpe was successfully applied to analysis of amaranth and nitrite in foodstuffs.
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کلیدواژه
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amaranth ,nitrite ,cuo/swcnts ,1-methyl-3-butylimidazolium bromide
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آدرس
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islamic azad university, sari branch, department of agriculture, iran, quchan university of advanced technology, department of chemical engineering, laboratory of nanotechnology, iran, islamic azad university, sari branch, department of agriculture, iran, islamic azad university, ayatollah amoli branch, department of food science and technology, iran
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Authors
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