Citrate stabilised silver nanoparticles as sensing probe for in-situ Sn²⁺ ion determination

ABSTRACT

We present a simple method for the determination of Sn²⁺ concentration using stannous-synthesised AgNPs as sensing probe at room temperature. The average particle size of stannous-synthesised AgNPs obtained from TEM analysis was about 14 nm with a symmetrical absorption band at 405 nm. The detection method was based on the formation of stable AgNPs using Sn²⁺ ion as reducing agent and trisodium citrate to maintain constant ionic strength at room temperature. It was observed that the variation of Sn²⁺ concentration showed linear function with the absorbance of AgNPs. The sensing characteristics of the AgNPs were evaluated for in-situ determination of Sn²⁺ ion. The determination of Sn²⁺ ion concentration revealed limit of detection (LOD) of 0.036 ^_ 0.040 μM. The obtained results of Sn²⁺ determination showed good recoveries in the range of 89% to 111%.

KEYWORDS:

• Stannous ion
• silver nanoparticles
• stannous determination
• sensing probe

Acknowledgments

The authors want to thank Alazhar university-Gaza for providing the necessary facilities.

Disclosure statement

No potential conflict of interest was reported by the authors.