Understanding Analysis Times - GE Sievers 900 Series Operation And Maintenance Manual

IC Concentration
50 - 100 ppm
0-50 ppm
Deionized water
For all samples, verify the pH of waste is <2 and adjust acid flow rate as necessary

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.
Parameter
Time to first measured
value
Time for flush and four
replicate measurements
Note: Additional time may be required if the reagent syringes must be filled during the analyses.
GE Analytical Instruments ©2009
Table 6: Recommended Acid Flow Rates
Acid Flow Rate with No
ICR or ICR Bypassed
2.0 µL/min
1.0 µL/min
0.3 µL/min
Table 7: Sample Analysis Times
Manual Reagent Mode
No ICR or
ICR Bypassed ICR Inline
12.2 min 13.7 min
24.2 min 25.7 min
Acid Flow Rate with ICR
4.0 µL/min
2.0 µL/min
not applicable
Autoreagent Mode
No ICR or
ICR Bypassed
26.4 min
38.4 min
99 of 236
Inline
ICR Inline
29.5 min
41.2 min
DLM 90488-01 Rev. A