Specifications

18
Refractive Index Detector
RID-20A
The RID-20A incorporates an auto purge function of the reference cell and a validation
support function, inheriting the stability and expandability of Prominence HPLC series.
The RID-20A differential refractive index
detector allows productivity improvements
in GPC analysis.
Excellent Reproducibility in Molecular Weight Distribution Analysis
DAY 1
DAY 3
DAY 7
DAY 10
DAY 20
Retention time
Retention time
reproducibility
(%RSD)
Excellent Baseline Stability
Generally speaking, differential refractive index detectors tend to be easily affected by changes in room temperature. The optical system of
the RID-20A, however, has a dual temperature control function that absorbs the effects of changes in room temperature, which ensures
excellent stability. The RID-20A achieves shorter baseline stabilization time after turning ON the power through improved dual-temperature
control of the optical system and superior lamp performance.
RID-20A Without
Cell-Temperature Control
µRIU
0.0
0.1
0.2
0.3
0
10
20
30 40 50
min
°C
22.5
23.0
23.5
Room Temperature
Room temperature
Baseline
RID-20A Cell Temperature
Controlled at 40°C
Room Temperature
µRIU
0.0
0.1
0.2
0.3
0
10
20
30 40 50
min
°C
22.5
23.0
23.5
Baseline
Room
temperature
Excellent baseline stability during changes in room temperature Elapsed time after power ON
Shimadzu's Proprietary Technology Supports Highly Sensitive Analysis to
Preparative Analysis Applications
The four-partition photodetector in the RID-20A allows a wide
refractive index range (0.01 to 5000 µRIU). The single detector supports
all applications from highly sensitive measurements to preparative
measurements using the three operation modes shown below.
A (Analytical) Mode
P (Preparative) Mode
L (Large-scale prep.) Mode
High-sensitivity to general-purpose analysis
High-concentration analysis, semi-preparative analysis
(up to 20 mL/min)
Flow selection block allows large-volume preparative
analysis. (up to 150 mL/min)
0.01
0.1
1
10
100
1000
10000
0.1
1 10 100 1000 10000 100000
µRIU
mg/L
Conc. of sucrose
A mode
P mode
µRIU
0
−5
−10
−15
−20
−25
0 102030405060708090100
min