In Situ Monitoring of Pb²⁺ Leaching from the Galvanic Joint Surface in a Prepared Chlorinated Drinking Water.

ABSTRACT: A novel method using a micro-ion-selective electrode (micro-ISE) technique was developed for in situ lead monitoring at the water-metal interface of a brass-leaded solder galvanic joint in a prepared chlorinated drinking water environment. The developed lead micro-ISE (100 μm tip diameter) showed excellent performance toward soluble lead (Pb²⁺) with sensitivity of 22.2 ± 0.5 mV decade^-1 and limit of detection (LOD) of 1.22 × 10^-6 M (0.25 mg L^-1). The response time was less than 10 s with a working pH range of 2.0-7.0. Using the lead micro-ISE, lead concentration microprofiles were measured from the bulk to the metal surface (within 50 μm) over time. Combined with two-dimensional (2D) pH mapping, this work clearly demonstrated that Pb²⁺

SUBMITTER: Ma X 

PROVIDER: S-EPMC7321811 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature