52 / 73
Ref. No. [UMCES] CBL 2015-014
ACT VS15-07
52
Figure 27.
Time series of pH measured by the Xylem EXO-pH1 instrument deployed during the 1 month
GLERL field trial.
Top Panel
: Continuous pH
Total
recordings from instrument (blue line) and pH
Total
of
adjacent grab samples determined by phenol red dye (red circles).
Bottom Panel
: Difference in measured
pH relative to reference samples (Instrument – Dye Ref) observed during deployment.