5
GPC
EcoSEC HIGH TEMPERATURE GPC SYSTEM
PERFORMANCE MEANS BASELINE STABILITY
Advanced engineering, along with complete temperature
control and a dual flow RI detector, means rock steady
baselines in even the most challenging solvents and tem-
peratures. The RI baselines as obtained for three common-
ly used high temperature GPC solvents: Trichlorobenzene
(TCB) at 145 °C, orthodichlorobenzene (ODCB) at 145 °C and
1-chloronaphthalene (1-CN) at 210 °C are shown in Figure 3.
The RI baseline drift for all three solvents is less than
1 mV/h.
The unmatched baseline stability of the dual flow RI detec-
tor in the EcoSEC High Temperature GPC System is also
shown in Table 1 through the drift, fluctuation, and noise
obtained when ODCB at 145 °C, TCB at 145 °C, 1-CN at
210 °C, and THF at 40 °C are used as the mobile phase.
40
A: ODCB
B: TCB
C: 1-CN
45
50
0
20
40
60
Detector response (mV)
Retention time (minutes)
BASELINE DRIFT OF THE DUAL FLOW REFRACTIVE INDEX DETEC-
TOR OF THE EcoSEC HIGH TEMPERATURE GPC SYSTEM FOR TCB,
ODCB, AND 1-CN
Column: TSKgel GMH
HR
-H(S) HT2, 13 µm, 7.8 mm ID × 30 cm L × 2;
Mobile phase: A: ODBC; B: TCB; C: 1-CN; Flow rate: 1.0 mL/min;
Detection: RI (EcoSEC High Temperature GPC System); Temperature:
A and B: 145 °C; C: 210 °C
FIGURE 3
BASELINE DRIFT, FLUCTUATION AND NOISE OF THE EcoSEC
HIGH TEMPERATURE GPC SYSTEM IN ODCB, TCB, 1-CN, AND THF
Solvent
Drift
Flucuation Noise
(temperature)
(mV/h)
(mV)
(mV)
ODCB (145 °C)
-0.41
0.54
0.044
TCB (145 °C)
-1.30
0.69
0.046
1-CN (210 °C)
-0.91
1.61
0.098
THF (40 °C)
-0.35
0.23
0.022
TABLE 1
