1. A colorimetric microfluidic paper-based analytical device for sulfonamides in cow milk using enzymatic inhibition.
- Author
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Carolina Rafanhin Sousa A, Nascimento Makara C, Canniatti Brazaca L, and Carrilho E
- Subjects
- Animals, Carbonic Anhydrases metabolism, Cattle, Colorimetry instrumentation, Hydrogen-Ion Concentration, Microfluidic Analytical Techniques, Milk metabolism, Nitrophenols chemistry, Nitrophenols metabolism, Sulfonamides metabolism, Carbonic Anhydrases chemistry, Colorimetry methods, Milk chemistry, Paper, Sulfonamides chemistry
- Abstract
To increase milk production, antibiotics are administered to animals to provide weight gain and to prevent or treat diseases. The inappropriate use of these substances can lead to antibiotic resistance and allergic reactions and toxic effects to milk consumers. We describe the development of a simple, fast, portable, and low-cost microfluidic paper-based analytical device (μPAD) to quantify sulfonamides in milk using the inhibition of the colorimetric reaction between carbonic anhydrase (CA) and 4-nitrophenyl acetate. The main advantages presented by the μPAD include reproducible batch production, simple application, and precise analysis without previous treatment. The µPAD displayed good linearity (R
2 ≥ 0.986) in a wide range of sulfonamides in milk (2.5 to 40.0 µmol L-1 ), being selective for the drugs even in a highly complex matrix. We expect that this device allows in situ monitoring of milk quality, reducing the prejudicial conditions associated with high concentrations of sulfonamides in milk., (Copyright © 2021 Elsevier Ltd. All rights reserved.)- Published
- 2021
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