<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Polymerized crystalline colloidal array chemical-sensing materials for detection of lead in body fluids"^^ . "We have developed intelligent polymerized crystalline colloidal array (IPCCA) chemical-sensing materials for detection of Pb2+ in high ionic-strength environments such as body fluids with a detection limit of <500 nmol L-1 Pb2+ (100 ppb). This IPCCA lead sensor consists of a mesoscopically periodic array of colloidal particles polymerized into an acrylamide hydrogel. The array Bragg-diffracts light in the visible spectral region because of the periodic spacing of the colloidal particles. This material also contains a crown ether chelating agent for Pb2+. Chelation of Pb2+ by the IPCCA in low-ionic-strength solutions results in a Donnan potential that swells the gel, which red-shifts the diffracted light in proportion to the Pb2+ concentration. At high ionic strength the Donnan potential is, unfortunately, swamped and no static response occurs for these sensors. We demonstrate, however, that we can determine Pb2+ at high ionic strength by incubating these IPCCA in a sample solution and then measuring their transient response on exposure to pure water. The non-complexed ions diffuse from the IPCCA faster than the bound Pb2+. The resulting transient IPCCA diffraction red-shift is proportional to the concentration of Pb2+ in the sample. These IPCCA sensors can thus be used as sensing materials in optrodes to determine Pb2+ in high-ionic-strength solutions such as body fluids."^^ . "2002-01-01" . . "373" . "7" . . "Analytical and Bioanalytical Chemistry"^^ . . . "16182642" . . . . . . . . . . . . . . . . . . . "MX"^^ . "Lin"^^ . "MX Lin"^^ . . "D"^^ . "Finegold"^^ . "D Finegold"^^ . . "CE"^^ . "Reese"^^ . "CE Reese"^^ . . "SF"^^ . "Peteu"^^ . "SF Peteu"^^ . . "SA"^^ . "Asher"^^ . "SA Asher"^^ . . . . . . "Polymerized crystalline colloidal array chemical-sensing materials for detection of lead in body fluids (Plain Text)"^^ . . . "licence.txt"^^ . . . "Polymerized crystalline colloidal array chemical-sensing materials for detection of lead in body fluids (Other)"^^ . . . . . . "indexcodes.txt"^^ . . "HTML Summary of #17152 \n\nPolymerized crystalline colloidal array chemical-sensing materials for detection of lead in body fluids\n\n" . "text/html" . .