title: A new method for stable lead isotope extraction from seawater.
abstract: A new technique for stable lead (Pb) isotope extraction from seawater is established using Toyopearl AF-Chelate 650M(®) resin (Tosoh Bioscience LLC). This new method is advantageous because it is semi-automated and relatively fast; in addition it introduces a relatively low blank by minimizing the volume of chemicals used in the extraction. Subsequent analyses by HR ICP-MS have a good relative external precision (2σ) of 3.5‰ for (206)Pb/(207)Pb, while analyses by MC-ICP-MS have a better relative external precision of 0.6‰. However, Pb sample concentrations limit MC-ICP-MS analyses to (206)Pb, (207)Pb, and (208)Pb. The method was validated by processing the common Pb isotope reference material NIST SRM-981 and several GEOTRACES intercalibration samples, followed by analyses by HR ICP-MS, all of which showed good agreement with previously reported values.
authors.affiliation: WIGS, Department of Microbiology and Environmental Toxicology, University of California Santa Cruz, 1156 High Street, Santa Cruz, CA 95064, United States. Electronic address: CZurbric@ucsc.edu.
authors.forename: Cheryl M
authors.initials: CM
authors.lastname: Zurbrick
authors.forename: Céline
authors.initials: C
authors.lastname: Gallon
authors.forename: A Russell
authors.initials: AR
authors.lastname: Flegal
mesh_terms: D000085:Acetates / Q000737:chemistry; D002138:Calibration; D002846:Chromatography, Affinity; D007854:Lead / Q000032:analysis* / Q000302:isolation & purification / Q000592:standards; D007856:Lead Radioisotopes / Q000032:analysis / Q000302:isolation & purification / Q000592:standards; D013058:Mass Spectrometry / Q000379:methods* / Q000592:standards; D012015:Reference Standards; D012117:Resins, Synthetic / Q000737:chemistry; D012623:Seawater / Q000737:chemistry*
chemical_list: D000085:Acetates; D007856:Lead Radioisotopes; D012117:Resins, Synthetic; D007854:Lead; C018824:ammonium acetate
keywords: Affinity chromatography; GEOTRACES; Lead isotopes; Seawater