Advertisement
Gas Phase Titrator
Flow Controllers
Pressure Regulator
Thermo Scientific
Scrubbing
Fixed bed reactors are commonly used in the last step of zero air generation
to remove the remaining contaminants by either further reaction or
absorption.
contaminants.
Table 4–1. Scrubbing Materials
To Remove
NO
Hydrocarbons
O
and NO
3
A gas phase titrator (GPT), such as is included in the Thermo Scientific
146iQ Multi-gas Calibrator, is used to generate NO
NO concentrations.
component parts of a gas phase titration apparatus.
Equipment Damage All connections between components in the system
should be made with glass, PTFE, or other non-reactive material.
The airflow controllers should be devices capable of maintaining constant
airflows within
should be capable of maintaining constant NO flows within
required flow rate.
The pressure regulator for the standard NO cylinder must have a non-
reactive diaphragm and internal parts, and a suitable delivery pressure.
Table 4–1
lists materials that can be effective in removing
2
Figure 4–1
2% of the required flow rate. The NO flow controller
Use
Soda-Lime (6-12 mesh), Purafil
Molecular Sieve (4A), Activated Charcoal
Activated Charcoal
concentrations from
2
shows the suggested placement of the
42iQ Instruction Manual
Calibration
Equipment Required
▲
2% of the
4-3
Advertisement
Chapters
