ACT pH Sensor Verification Protocols, PV12-01
16
•
Lab test is initiated on November 9, 2012.
•
Laboratory tests will be completed by February 2013.
•
Instruments will be returned to companies by February 2013
•
ACT will convene a workshop to review Lab results and develop the protocols for the
field testing component of the Verification in April 2013.
•
Finalize Field testing protocols in May 2013
•
Conduct field tests July – November 2013
•
Final Performance Verification Statements will be released to the public in March 2014.
10.
Roles and Responsibilities
The Verification is coordinated and supervised by the ACT Chief Scientist and ACT
Partner institution personnel. Staffs from the Partner institutions participate in this test by
installing, maintaining, and operating the respective technologies throughout the test; operating
the reference equipment, collecting and analyzing the reference water samples, downloading the
data from the instrument package, and informing the ACT Chief Scientist staff of any problems
encountered. Manufacturer’s representatives shall train ACT staff in the use of their respective
technologies and, at their discretion, observe the calibration, installation, maintenance, and
operation of their instruments throughout the test. QA oversight is provided by the ACT QA
Manager. In addition to aiding the development of these protocols, the external Technical
Advisory Committee will be consulted during the evaluation in the event problems occur, will
assist in the analysis of results, and will review the final Performance Verification Statements
prior to their release.
11.
References
Dickson, A.G., Sabine, C.L. and Christian, J.R. (Eds.) 2007. Guide to Best Practices for Ocean
CO
2
Measurements.
PICES Special Publication 3
, 191
pp.
Easley R.A. and R.H. Byrne 2012 Spectrophotometric calibration of pH electrodes in seawater
using purified m-cresol purple. Environmental Science and Technology 46:5018-5024.
Liu, X., M. Patsavas, R. Byrne 2011. Purification and Characterization of meta-Cresol Purple for
Spectrophotometric Seawater pH Measurements. Environ. Sci. & Techno. 45:4862-4868.
Yao, W., R. Byrne 2001. Spectrophotometric Determination of Freshwater pH Using
Bromocresol Purple and Phenol Red Environ. Sci. Technol. 35:1197-1201.
