期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 137, 期 -, 页码 503-508出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2014.09.004
关键词
Silver nanoparticles; Biosynthesis; Glutathione; Mercury; Colorimetric detection
类别
资金
- Science and Engineering Research Board, Department of Science and Technology, Government of India [SB/FT/LS-281/2012, SR/FT/LS-19/2012]
- SASTRA University, Thanjavur
The present study investigated the colorimetric detection of mercury (Hg2+) ions by using silver nanoparticles (Ag NPs) in the presence of glutathione. The nanoparticles used in the study were synthesized biologically by using Polyalthia longifolia leaf extract. The synthesized nanoparticles were characterized by UV-visible spectrophotometer, transmission electron microscope, X-ray diffraction, particle size analyzer and zeta sizer. The particles were spherical in shape and it possesses the effective diameter of 5 nm. The zeta potential of the particles was determined to be -28.6 mV. Ag NPs-glutathione conjugates were able to detect Hg2+ in nanomolar level. Ag NPs-glutathione conjugates upon interaction with Hg2+ changes from yellowish brown to pale yellow and finally colorless. The study may be applied for the qualitative and quantitative estimation of mercury at very low concentration. (C) 2014 Elsevier B.V. All rights reserved.
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