TA Instruments TGA 2950 - Calcium Oxalate Example Scans

TA I NSTRUMENTS TGA 2950 B–13
Hi-Res
TM
Option
Calcium Oxalate
Example Scans
In this example, five TGA scans of calcium
oxalate monohydrate (CaC
2
O
4
.H
2
O) were run in
nitrogen to compare the results using
conventional TGA and Hi-Res
TM
TGA. In all
cases a single ramp or Hi-Res
TM
ramp segment
from ambient to 800
°
C was used for the method.
Figures B.1 and B.2 show the results of constant
heating rate scans at 20
°
C/minute and 1
°
C/
minute. Figures B.3, B.4 and B.5 show the
results of Hi-Res
TM
scans at 50
°
C/minute with
resolution settings 3.0, 4.0 and 5.0 respectively.
Figure B.6 shows a composite plot of the
derivative of weight loss for each of the five
scans. The derivative smoothing window for all
plots was set to 5
°
C.
Figure B.1