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An electrochemical method based on the assembly of graphene quantum dots (GQD) and Nafion onto a glassy carbon electrode (GQD@Nafion/GCE) was developed to detect sulfonamide residues in milk. The resulting modified electrode (GQD@Nafion/GCE) demonstrated a significant increase in sensitivity compared to a bare GCE. Repeatability, reproducibility, and stability studies also indicated the suitability...
A fast, simple screening method for discriminating between natural and adulterated saffron was developed that reduces the need for time-consuming techniques. The method uses a flow manifold where saffron samples containing adulterants in a phosphate buffer are passed through a column packed with cotton that retains the adulterants for subsequent elution with dilute ammonia. Samples testing positive...
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