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- W3036959629 abstract "We describe the amplification of amperometric l-lysine biosensor using l-lysine oxidase nanoparticles (LOxNPs) and graphene oxide nanoparticles (GrONPs) immobilized onto pencil graphite electrode (PGE). LOxNPs and GrONPs were characterized by UV spectroscopy and transmission electron microscopy (TEM). The working electrode (LOxNPs/GrONPs/PGE) was studied by scanning electron microscopy (SEM) and cyclic voltammetry at different stages of its construction. The biosensor showed optimum current at 0.7 V, pH 6.5, 35 °C, a detection limit of 0.01 μM, response time as 3.95 s and a wider linear range 0.01–1000 μM. The analytical recovery of added lysine in sera was 97 %. The within assay and between batch coefficients of variation for the biosensor were 0.068 and 0.074 % respectively. The biosensor measured l-lysine levels in sera of healthy adults and human immunodeficiency virus (HIV) patients. The biosensor exhibited good correlation with standard spectrophotometric method (R2 = 0.989). The biosensor lost 35 % of its original activity after its regular uses for a period of 180 days, while being stored dry at 4 °C." @default.
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- W3036959629 date "2020-10-01" @default.
- W3036959629 modified "2023-10-05" @default.
- W3036959629 title "Amperometric l-lysine determination biosensor amplified with l-lysine oxidase nanoparticles and graphene oxide nanoparticles" @default.
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- W3036959629 doi "https://doi.org/10.1016/j.procbio.2020.06.011" @default.
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