Science Inventory

Test/QA Plan for Verification of Nitrate Sensors for Groundwater Remediation Monitoring

Citation:

MCKERNAN, J., A. Barton, AND A. Dindal. Test/QA Plan for Verification of Nitrate Sensors for Groundwater Remediation Monitoring. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-10/104, 2010.

Impact/Purpose:

To inform public

Description:

A submersible nitrate sensor is capable of collecting in-situ measurements of dissolved nitrate concentrations in groundwater. Although several types of nitrate sensors currently exist, this verification test will focus on submersible sensors equipped with a nitrate-specific ion-selective electrode (ISE) for monitoring dissolved nitrate concentrations. Nitrate-specific ISE sensors typically work on the principal of direct potentiometry, whereby two electrodes (a sensing electrode and a reference electrode) are contained within the sensor unit. The reference electrode is immersed in a solution of a constant nitrate concentration within the sensor housing, and ionic charge transfer between this solution and the sensing electrode is measured and converted to a concentration that is representative of a dissolved nitrate concentration of the aqueous solution being analyzed.

URLs/Downloads:

TEST/QA PLAN FOR VERIFICATION OF NITRATE SENSORS FOR GROUNDWATER REMEDIATION MONITORING

VT-AMS Webpage

Record Details:

Record Type: DOCUMENT (ETV DOCUMENT)
Product Published Date: 08/30/2010
Record Last Revised: 09/09/2010
OMB Category: Other
Record ID: 227907

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL RISK MANAGEMENT RESEARCH LABORATORY

IMMEDIATE OFFICE

ENVIRONMENTAL TECHNOLOGY VERIFICATION, ASSESSMENT, AND OUTCOMES STAFF