Refractive Index Detector
Inheriting the stability and extensibility that are the strengths of the Prominence series, the new RID-20A model of differential refractive index detector is designed with a new reference-cell auto-purge feature and validation support function.
Reduced Stabilization Time and Improved Baseline Stability ：After 30 Minutes Power on
The RID-20A reduces the time to stabilization after power-on dramatically by utilizing dual temperature control for the optical system.
The stable baseline provides the accurate analysis of the molecular weight distribution.
Short Warm-up Time and Improved Baseline Stability
The optical system is housed inside a dual-temperature-controlled block. The temperature of the incoming mobile phase is controlled in two stages; consequently, the stabilization time is significantly shorter than with conventional systems. This dual-temperature control also helps significantly reduce baseline drift, thus increasing the reliability of analysis data.
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||High-sensitivity to general-purpose analysis|
|P (Preparative) Mode||High-concentration analysis,
semi-preparative analysis (up to 20 mL/min)
|L (Large-prep.) Mode||Flow selection block
allows large-volume preparative analysis. (up to 150 mL/min)
4-Partitioned Detector Element
The detector element of the RID-20A is partitioned into four parts, and the parts used can be changed electrically. In A mode (for high-sensitivity analysis), the partitions are grouped left-right (combinations of A+C and B+D), and in P and L modes (for preparative analysis), the partitions are grouped top-bottom (combinations of A+B and C+D). In P and L modes, because measurement is possible regardless of the position of the element's center line, large refractive indexes for high-concentration samples can be handled.
30%*Savings in Solvent Usage over Conventional Performance and Reduced Environmental Burden
The amount of mobile phase consumed can be saved by returning column eluate to the mobile phase bottle during intervals when no component peaks are eluted. Cost of analysis per sample is reduced and burden placed on the environment is mitigated. The recycle valve kit can be attached to the RID-20A and the SPD-20A/20AV.
When performing a 15-minute analysis 50 times (flow rate: 1 mL/min)
Without recycle valve kit ... 750 mL
With recycle valve kit ... 500 mL
→ Mobile phase usage reduced by approx. 30%*
(* under specified conditions)
|Refractive index range||1 to 1.75 RIU||Maximum operating flow rate||20 mL/min (150 mL/min with option|
|Noise level||2.5 ×10-9 RIU max||Temperature control of cell unit||30 to 60 ℃|
|Drift||1×10-7 RIU/h max||Cell volume||9 μL|
A mode: 0.01 × 10-6 to 500 × 10-6 RIU
P and L mode: 1 × 10-6 to 5,000 × 10-6 RIU
|Cell withstand pressure||2 MPa (cell unit）|
|Response||0.05 to 10 sec, 10 steps||Operating temperature range||4 to 35 ℃|
|Polarity switching||SupportedDimensions, weight||Dimensions, weight||W260 × D420 × H140 mm, 12 kg|
|Zero adjustment||Auto zero, optical zero, fine zero||Power requirements||AC 110 V, 230 V, 150VA, 50/60 Hz|
Please contact representative if you need Hexafluoroisopropanol(HFIP) as the mobile phase.
Pressure Relief Valve
The RID-20A incorporates various safety features. Its maximum pressure is five times that of former Shimadzu products and, as a standard feature, it incorporates a sensor that detects leakage from the cell unit. For extra safety, a pressure relief valve that prevents problems related to back-pressure irregularities is also available as an option.