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Cd 2+ , Cu 2+ , Pb 2+ , Sr 2+ , and Y 3+ binding characteristics of 17β‐estradiol molecularly imprinted polymer particles incorporated with dicyclohexano‐18‐crown‐6 for urine bioassay
Author(s) -
Lai Edward P. C.,
Bahraini Negar,
Li Chunsheng,
Sadi Baki B.,
Kramer Gary H.
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.34409
Subject(s) - molecularly imprinted polymer , chemistry , nuclear chemistry , anodic stripping voltammetry , ionic strength , metal , polymer , metal ions in aqueous solution , selectivity , electrochemistry , aqueous solution , electrode , organic chemistry , catalysis
The metal ion binding characteristics of molecularly imprinted polymer (MIP) submicron particles prepared using 17β‐estradiol (E2) as a template, and incorporated with dicyclohexano‐18‐crown‐6 (DCH18C6), were studied using differential pulse anodic stripping voltammetry. When Sr 2+ was added to DCH18C6‐E2‐MIP particles already occupied by Cd 2+ , Cu 2+ , and Pb 2+ inside the binding sites, a displacement reaction was observed: Cd 2+ /Cu 2+ /Pb 2+ ‐DCH18C6‐E2‐MIP + Sr 2+ = Sr 2+ ‐DCH18C6‐E2‐MIP + Cd 2+ /Cu 2+ /Pb 2+ . This demonstrated that DCH18C6 had stronger binding affinity for Sr 2+ than Cd 2+ Cu 2+ or Pb 2+ . Strong DCH18C6 binding affinity was also observed for Y 3+ . Atomic emission spectrometry showed that DCH18C6‐E2‐MIP particles (150 mg/mL) resulted in 52% binding of Sr 2+ (2000 ppm, at pH 6.3 ± 0.1 and ionic strength of 0.1 M NaNO 2 ). © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011