Page 8 - Shimadzu Prominence

Solvent Delivery Units

LC-20AD
Superior Solvent Delivery Performance
The LC-20AD offers the fastest solvent delivery performance in the world. With an automatic
pulsation-correction mechanism and high-speed micro plunger driving, it achieves pulse-free
solvent delivery. Thanks to improvements in solvent-delivery control firmware, solvent-delivery
performance in the micro-flow-rate range below 50 μL/min has been significantly improved.
LC-20AB
Binary Solvent Delivery Unit
The LC-20AB is a binary, high-pressure gradient solvent delivery unit that
incorporates two sets of LC-20AD systems. Its space-saving design can be used to
create a two-solvent high-pressure gradient.
LC-20AT
Superior Maintainability
The LC-20AT possesses a high level of maintainability while delivering high
performance. The ability to remove bubbles has been improved by modifying the
pump-head structure and the flow line.

Low-Pressure Gradient Unit Accurate Gradient Solvent Delivery
The optional low-pressure gradient unit can be incorporated in the By harmonizing two solvent delivery systems, the LC-20AB delivers
LC-20AD/20AT, enabling gradient elution in a compact space with solvent with an accurate concentration across a wide range from
a small void volume. Automatic matching adjustment of the the micro flow rate region to the conventional flow rate region.
solenoid valve and pump gives concentration accuracies of ±1.0%.
Set value (%) Measured value (%)
10 9.98
20 20.05
30 30.09
40 40.03
50 50.03
60 60.02
70 70.01
80 80.00
90 90.05

A new type of plunger made with a technique that reflects
consideration of the material structure and a precise Continued Improvements to
plunger-holding mechanism help to increase the service life of Solvent Delivery Specifications
plunger seals and enable stable solvent delivery over long periods.
The flow rate accuracy and precision in the micro flow rate region
have been improved thanks to the adoption of a new type of check
Plunger supported by floating mechanism
valve and modifications to the solvent-delivery control method.
Nonpolar organic solvents, such as hexane, can be delivered stably.
Flow-Rate Accuracy Flow-Rate Precision
Flow-rate
Set value Measured value, Set value reproducibility,
(mL/min) n = 6 (mL/min) (mL/min)
n = 6 (RSD%)
0.010 0.010 0.010 0.49
0.050 0.050 0.050 0.08
0.200 0.201 0.200 0.08
1.000 1.000 1.000 0.01
Plunger seal and center in alignment

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