Silver Biocide Analysis & Control Device, Phase II

Metadata Updated: November 12, 2020

Rapid, accurate measurement and process control of silver ion biocide concentrations in future space missions is needed. The purpose of the Phase II program is to complete the development of an Smart Electroanalytical Multi-Sensor (SEMS) device for analysis and process control of biocidal silver in potable water, with the option integrating an Ag+ ion generator. The device will automatically provide continuous and on-demand maintenance of Ag+ ion biocide levels in spacecraft water streams and storage tanks, as well as providing output data for silver concentrations and a profile of total silver added to the system over time. Considerable test work is planned under AES programs and, given silver ion's 'elusiveness' in water systems, the data will be far more reliable if the methodology for adding the biocide and measuring its concentration is performed by a reliable and flight-qualifiable design from the beginning. Phase I culminated in a validated analytical methodology and 4 flight preproduction prototype for measurement and control of silver ion at sub-ppb levels in finished waters. The Phase II Technical Objectives and Work Plan are dedicated to fabrication, test & delivery of 3 flight-qualifiable instruments that conform to spacecraft applications and specifications as defined by NASA. The specific objectives will be to 1) develop a complete analytical characterization of the detection method, inclusive of automated autocalibration and QA/QC functions, 2) develop automated machine-learning capability to support agile & reliable operation in long-duration missions, 3) demonstrate the Feedback Control Function to maintain consistent Ag+ ion concentration in active water systems, and 4) demonstrate all operating parameters required to analyze Ag+ in the ranges of 50-5000 ug/l in potable water.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources


Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Publisher Space Technology Mission Directorate
Unique Identifier Unknown
Identifier TECHPORT_93757
Data First Published 2019-05-01
Data Last Modified 2020-01-29
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 12c192ce-6229-42ea-9811-ebbe2f345bf9
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL
Program Code 026:027
Source Datajson Identifier True
Source Hash e5a553637491a9d1174ad32ad1f5edc35c200b06
Source Schema Version 1.1

Didn't find what you're looking for? Suggest a dataset here.