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Ref. No. [UMCES] CBL 2015-013
ACT VS15-06
accuracy with a mean difference from reference of -0.010 ± 0.033 (N=8) compared to 0.014 ±
0.003 (N=27) for measurements in the first week of the lab test (data not shown). The higher
variance may have resulted from the final trial including continuously changing temperature
conditions.
Figure 3.
Time series of the Sunburst Sami pH test instrument pH results along with the dye reference
pH results for the complete ten week lab test. Results include nine rapid pH transition tests conducted at
each temperature and salinity condition. Detailed plots of each transition test are provided in Appendix I.
Lab testing results were further examined for the stable portions of the test for each of the
source waters and these data do not include any of the pH shifts or temperature shifts. For the
saltwater trials, salinity was maintained within 0.12 units (range = 35.14 to 35.26) with an
average of 35.19 and temperature was maintained to within 0.8
o
C for each set point (Fig. 4 top).
The first temperature trial ranged from 20.07 to 20.88
o
C, with an average of 20.27
o
C., the
second temperature trial ranged from 9.98 to 10.64
o
C, with an average of 10.12
o
C, and the third
temperature trial ranged from 29.77 to 30.53
o
C, with an average of 29.90
o
C. Time series results
of the SAMI-pH, Metrohm data and reference pH data are shown in middle panel. The time
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