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Ref. No. [UMCES] CBL 2017-050

ACT VS17-05

13

Lab Concentration Range Challenge

Figure 1.

Top Panel:

Plot

of instrument (blue dots) and reference (red dots) measurements of NO

3

in the

laboratory concentration range challenge covering ambient plus 6 concentration ranges. Five replicate

measurements were made at each concentration level along with three measurements at ambient level.

Bottom Panel:

Plot of the absolute difference in mgN/L between Real-NO3 and reference measurement.