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Chapter 5. Calibration and Verification
Overview
Calibration of the Sievers InnovOx On-Line TOC Analyzer for NPOC, IC, TC and TOC (TC- IC) measurements is
accomplished using standards that contain known concentrations of carbon of interest. It is required that the
InnovOx be calibrated for the specific mode that you will be running samples.
Each measurement range (e.g., Up to 1000 ppm) in the Analyzer is calibrated separately. The Sievers InnovOx
On-Line TOC Analyzer can store multiple calibrations for any of its five ranges (up to a total of 20 calibrations).
NPOC and IC calibration can be made with one-to-six points. TC/TOC calibration can be made with one-to-six TC
points and zero-to-six IC points. (For best results, make sure to rinse with one Reagent Water vial in between the
IC and TOC vials.) These points can be individual calibration standards of different concentrations, or the Auto
Dilution feature can be used. When Auto Dilution is selected, the Analyzer automatically dilutes a standard
solution to a lower concentration selected by the operator.
When an application involves measurement of samples containing less than about 10 ppm TOC, you may want
to correct the calibration for the blank associated with the reagents and dilution water. Blank Corrected
calibrations and verifications are described on
"Blank Correction" on page
114.
When you analyze a sample, the Analyzer allows you to specify which calibration will be used for that analysis;
thus, you can specify the use of different calibrations with particular sample matrices. Or, you may use
calibrations that focus on particular concentration ranges that may be appropriate to your different
applications.
GE Analytical Instruments ©2016
105 of 270
DLM 68100-09 EN Rev. A
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