Add time:09/30/2019 Source:infona.pl
A novel modified glassy carbon electrode with HOLMIUM FLUORIDE (cas 13760-78-6) (HoF 3 ) nanoparticles (HoFNPs)-multiwalled carbon nanotubes (MWCNTs) is fabricated and then successfully used for the sensitive and selective determination of uric acid (UA) in the presence of ascorbic acid (AA) and dopamine (DA). HoFNPs are successfully attached on the multi-walled carbon nanotubes (MWCNTs) via the intermediate of noncovalent hydrophobic interactions of the MWCNTs surface with sodium dodecyl sulfate (SDS). A detailed investigation by transmission electron microscopy (TEM) and electrochemistry is performed in order to elucidate the preparation process and properties of the nanocomposites. TEM image shows that the particle size of HoFNPs is about 56nm. Linear calibration plot is obtained over the range 2.0×10 −7 –5.0×10 −4 M (0.2–500.0μM) with a detection limit 1.6×10 −7 M (0.16μM) for UA. The modified carbon electrode proves to have good sensitivity, stability and performance for determination UA in the presence of AA, DA in human blood serum and urine samples.
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