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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 14, Number 5
BKCSDE 14(5)
May 20, 1993 

 
Title
Application of Laser Induced Photoacoustic Spectroscopy in the Investigation of Interaction of Neodymium(Ⅲ) with Water Soluble Synthetic Polymer
Author
Tae-Hyun Yoon, Hichung Moon, Seung Min Park, Joong Gill Choi, Paul Joe Chong
Keywords
Abstract
Laser-induced photoacoustic spectroscopy (LIPAS), which utilizes the photothermal effect that results from nonradiative relaxation of excited state molecules, was used in the speciation analysis of the complexes of neodymium(Ⅲ) and water soluble synthetic polyelectrolyte, poly methacrylic acid (PMAA), in 0.1 M NaClO4 at pH of 6.0. The minimum detection limit of Nd(Ⅲ) by LIPAS was 5.O×10-6 M. Experiment was carried out at low concentration ratio of Nd(Ⅲ) to PMAA to assure that 1 : 1 complexes predominate. The bound and free Nd(Ⅲ) species were characterized by measuring nonradiative relaxation energy of the excited states (2G7/2 and 4G5/2) to the metastable state (4G3/2). Two species were quantified by deconvolution of the mixed spectrum using their respective reference spectra. The conditional stability constant measured by LIPAS was 5.52 L· mol-1.
Page
574 - 578
Full Text
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