Journal
ELECTROANALYSIS
Volume 27, Issue 2, Pages 415-428Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.201400464
Keywords
Carbon paste electrode; Phthalocyanine; Gold nanoparticles; Sensor; Morphine; Human urine
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Funding
- University of Cairo (Office of President for Graduate Studies and Research)
- National Organization for Drug Control and Research (NODCAR, Egypt)
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Composites of gold nanoparticles (Au) electrochemically deposited and different metal phthalocyanines (Co, Ni, Cu, and Fe) were chemically prepared. The composites were used as modifiers for carbon paste electrodes and were used for the determination of morphine in presence of ascorbic acid and uric acid. Central metal atoms of phthalocyanine moiety affected the rate of electron transfer. Thus, the electroactivity of different modifiers were evaluated towards morphine oxidation. Au-CoPcM-CPE possessed the highest rate for charge transfer rate in all studied pH electrolytes. Limit of detection was 5.48 x 10(-9) molL(-1) in the range of 4.0 x 10(-7) to 9.0 x 10(-4) molL(-1).
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