Journal
TALANTA
Volume 194, Issue -, Pages 357-362Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2018.10.047
Keywords
Multi-walled carbon nanotubes; Gold nanoparticles; Surface-enhanced Raman spectroscopy; Sulfapyridine; Milk samples
Categories
Funding
- Spanish Ministry of Economy and Competitiveness (MINECO) [CTQ2016-78793-P]
- JJCC Castilla-La Mancha [SBPLY/17/180501/000262]
- INCRECYT research contract
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The fabrication of surface-enhanced Raman spectroscopy (SERS) substrates, which can offer the advantages of strong Raman signal enhancement with good reproducibility, is still a challenge for practical applications. In this work, a simple and reproducible SERS substrate combining the properties of multi-walled carbon nanotubes (MWCNTs) and gold nanoparticles (AuNPs), is proposed for the determination and quantification of sulfapyridine in milk samples with a concentration range of 10-100 ng mL(-1). The Raman signals of sulfapyridine is enhanced at factor of 4394. The procedure presented is capable of detecting and quantifying small quantities of sulfapyridine without implying any preconcentration step, just using an affordable and portable Raman spectrometer. The precision, in terms of repeatability and inter and intermediate precision, was lower than 8% in all cases.
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