GE Analytical Instruments ©2009 99 of 236 DLM 90488-01 Rev. A
Understanding Analysis Times
Analysis times in Sievers 900 Series TOC Analyzers vary depending on the type of reagent settings
you use, either Autoreagent mode or manual reagents mode. Analysis times for measurements
using the Autoreagent setting will be longer (and the volume of sample consumed is greater), as the
Analyzer must identify the correct flow rates to use before starting full analysis. Table 7 on page 99
shows a comparison of analysis times based on the reagent setting.
Note: Additional time may be required if the reagent syringes must be filled during the analyses.
Table 6: Recommended Acid Flow Rates
IC Concentration
Acid Flow Rate with No
ICR or ICR Bypassed
Acid Flow Rate with ICR
Inline
50 - 100 ppm 2.0 µL/min 4.0 µL/min
0-50 ppm 1.0 µL/min 2.0 µL/min
Deionized water 0.3 µL/min not applicable
For all samples, verify the pH of waste is <2 and adjust acid flow rate as necessary
Table 7: Sample Analysis Times
Parameter Manual Reagent Mode Autoreagent Mode
No ICR or
ICR Bypassed ICR Inline
No ICR or
ICR Bypassed ICR Inline
Time to first measured
value
12.2 min 13.7 min 26.4 min 29.5 min
Time for flush and four
replicate measurements
24.2 min 25.7 min 38.4 min 41.2 min
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