| TEOM Series 1500 Monitor |
TGA and Conventional Microbalance |
| Flow-through packed sample bed. Well-defined gas-solid phase. |
Flow around and over sample pile. Boyancy and flow concerns. |
| Flow rates up to 2 l/min without degrading
resolution. |
Flow rates greater than 100 ml/min can cause
noise. |
No reduction in mass resolution at high
temperature and high pressure. |
Significant reduction in mass resolution at
high temperature; high pressure generally not available. |
| Response time of 0.1 sec. |
Response time of 10 to 30 sec; not suited for short duration and kinetics study. |
| Small void volume, pulses remain intact. |
Pulses cannot be kept intact. |
| Utilizes realistic conditions found in a commercial reactor. |
Limited operating conditions. |
| Separation of electronics and reactor. |
Reactor and electronics in same chamber, leading to possible contamination issues. |
| Purge and cool-down time of 1-2 hours. |
Purge and cool-down time of 5-6 hours, limiting users to one experimental run per day. |
