Abstract
In this work, porous silicon (PSi) sample was employed to increase the SERS efficiency for rapid detection of penicillins in spiked milk by developing Au nanoparticles (AuNPs)/PSi hybrid structure. SERS was used to study penicillin G and ampicillin residue in milk. The results show that the AuNPs/PSi hybrid structure is very able to detect penicillins residue in milk with an excellent linear relationship and a correlation coefficient (R2 = 1) in the range of 1 × 10−7 mol/L to 1 × 10−9 mol/L. The highest enhancement factors of penicillin G (2.8 × 108) and of ampicillin (1.2 × 108) with an excellent relative standard deviation (RSD) of 2.69 and 0.93, respectively, are obtained at the ultra-low concentration of 1 × 10−9 mol/L. The detection limit of penicillin G and ampicillin is 1 × 10−9 mol/L (equal to 0.33 μg/kg and 0.35 μg/kg, respectively) which is very lower than the maximum residue limit (MRL) of penicillins in milk (4 μg/kg) established by the European Union.
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The authors would like to thank University of Technology, Baghdad, Iraq, and Mustansiriyah University (www.uomustansiriyah.edu.iq), Baghdad, Iraq, for their support in the present work.
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Wali, L.A., Hasan, K.K. & Alwan, A.M. An Investigation of Efficient Detection of Ultra-Low Concentration of Penicillins in Milk Using AuNPs/PSi Hybrid Structure. Plasmonics 15, 985–993 (2020). https://doi.org/10.1007/s11468-019-01096-4
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DOI: https://doi.org/10.1007/s11468-019-01096-4