Peer-Reviewed Journal Details
Mandatory Fields
Fredj Z.;Ben Ali M.;Abbas M.;Dempsey E.
Analytica Chimica Acta
Determination of prostate cancer biomarker acid phosphatase at a copper phthalocyanine-modified screen printed gold transducer
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Optional Fields
Acid phosphatase Copper phthalocyanine Gold screen-printed electrode Naphthol Phosphate
© 2019 Elsevier B.V. In this work, a novel sensor based on immobilised copper phthalocyanine, 2,9,16,23-tetracarboxylic acid-polyacrylamide (Cu(II)TC Pc-PAA) was developed for determination of acid phosphatase (ACP) levels in nanomolar quantities. Detection was based on the measurement of enzymatically generated phosphate, with initial studies focused on phosphate detection at a Cu(II)TC Pc-PAA modified screen-printed gold transducer. The sensor was characterised in relation to operational performance (pH, response time, stability, linearity, and sensitivity) and common anionic interferents (nitrate, sulphate, chloride, and perchlorate). The functionalised surface also facilitated rapid detection of the enzyme bi-product 2-naphthol over the range 5–3000 μM. Quantitation of ACP was demonstrated, realising a linear response range of 0.5–20 nM and LOD of 0.5 nM, which is within the clinical range for this prostate cancer biomarker.
Grant Details