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Khalkho BR, Deb MK, Kurrey R, Sahu B, Saha A, Patle TK, Chauhan R, Shrivas K. Citrate functionalized gold nanoparticles assisted micro extraction of L-cysteine in milk and water samples using Fourier transform infrared spectroscopy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 267:120523. [PMID: 34715558 DOI: 10.1016/j.saa.2021.120523] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 10/12/2021] [Accepted: 10/17/2021] [Indexed: 06/13/2023]
Abstract
This paper describes the sensing application of citrate functionalized gold nanoparticles (AuNPs) employing for the determination of L-cysteine in food and water samples. It is established with diffuse reflectance Fourier transform infrared (DRS-FTIR) spectroscopic analysis. The disappearance of the thiol (-SH) band in the FTIR spectra and the shift in the peaks of the amino group (NH3+) and carboxylate group (-COO-) indicated the Au-S interaction and the aggregation of the NPs. The signal intensity of L-cysteine was enhanced due to hot-spots formed by the aggregation of AuNPs producing the effective absorption of electromagnetic radiation in the IR region for molecular vibration. The relationship between AuNPs and L-cysteine was theoretically investigated by the Density Function Theory (DFT) based on LANL2DZ with the aid of the Gaussian 09 (C.01) software. Interaction between AuNPs and L-cysteine molecules resulted to a shift to higher wavelengths in the plasmon bands, further verified by transmission electron microscopes (TEM), which have indicated random aggregated particles. Further dynamic light scattering (DLS) measurements showed a relatively high degree of polydispersity confirming the aggregation of the particles. Under optimized conditions, the calibration curve showed a good linearity range from 20 to 150 μg mL-1 with a correlation coefficient (R2) 0.990. The limit of detection and quantification were 1.04 and 3.44 μg mL-1, respectively by DRS-FTIR. This modified AuNPs sample was used successfully in milk and water samples with adequate results to determine L-cysteine.
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Affiliation(s)
- Beeta Rani Khalkho
- School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur 492010, Chhattisgarh, India
| | - Manas Kanti Deb
- School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur 492010, Chhattisgarh, India; School of Studies in Environmental Science, Pt. Ravishankar Shukla University, Raipur 492010, Chhattisgarh, India; National Center for Natural Resources, Pt. Ravishankar Shukla University, Raipur 492010, Chhattisgarh, India.
| | - Ramsingh Kurrey
- School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur 492010, Chhattisgarh, India
| | - Bhuneshwari Sahu
- School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur 492010, Chhattisgarh, India
| | - Anushree Saha
- School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur 492010, Chhattisgarh, India
| | - Tarun Kumar Patle
- School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur 492010, Chhattisgarh, India
| | - Ravishankar Chauhan
- National Center for Natural Resources, Pt. Ravishankar Shukla University, Raipur 492010, Chhattisgarh, India
| | - Kamlesh Shrivas
- School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur 492010, Chhattisgarh, India
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Laban B, Ralević U, Petrović S, Leskovac A, Vasić-Anićijević D, Marković M, Vasić V. Green synthesis and characterization of nontoxic L-methionine capped silver and gold nanoparticles. J Inorg Biochem 2020; 204:110958. [DOI: 10.1016/j.jinorgbio.2019.110958] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 12/03/2019] [Accepted: 12/08/2019] [Indexed: 12/19/2022]
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Polystyrene nanofibers capped with copper nanoparticles for selective extraction of glutathione prior to its determination by HPLC. Mikrochim Acta 2018; 185:321. [DOI: 10.1007/s00604-018-2845-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 05/22/2018] [Indexed: 02/07/2023]
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