Detection of alprazolam with a lab on paper economical device integrated with urchin like Ag@ Pd shell nano-hybrids

Abstract

We present results of the studies relating to fabrication of a microfluidic biosensor chip based on urchin like Ag@ Pd shell nano-hybrids that is capable of sensing alprazolam through electrochemical detection. Using this chip we demonstrate, with high reliability and in a time efficient manner, the detection of alprazolam present in buffer solutions at clinically relevant concentrations. Methylene blue (MB) was also doped as redox transition substance for sensing alprazolam. Nano-hybrids modified EμPAD showed wide linear range 1-300ng/ml and low detection limit of 0.025ng/l. Low detection limit can further enhance its suitability for forensic application. Nano-hybrids modified EμPAD was also employed for determination of drug in real samples such as human urine. Reported facile lab paper approach integrated with urchin like Ag@ Pd shell nano-hybrids could be well applied for the determination of serum metabolites.

Keywords: Alprazolam; Methylene blue; Micro fluidic paper-based analytical device (EμPAD); Nano-hybrids; Palladium shell; Silver nanoparticles; Urchin like Ag@ Pd shell nano-hybrids.