Chapter 5: Calibration And Verification; Overview - GE Sievers InnovOx Operation And Maintenance Manual

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 the form 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 each of its four ranges. 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.
(Make sure to rinse with one NPOC 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 98.
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.
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