Microflow Liquid Chromatography Mass Spectrometry System

Robust and Easy-to-Use Microflow ESI Source

Micro-ESI™ Sources

Shimadzu’s Micro-ESI LCMS source has been designed for optimal sensitivity and ease of use. An X–Y adjustable stage and viewing camera allow for easy ESI spray needle adjustment. The column oven is mounted on the LCMS to minimize the volume between the exit of the column and the ESI needle.
The Micro-ESI probe also features an ESI spray angle optimized for microflow rates, and is available for triple quadrupole mass detection mass spectrometryand quadrupole time-of-flight mass spectrometry, respectively.

 

CTO-Mikros™ + UF-Link™: Easy, Dependable Column Installation

Mounted to the Micro-ESI source is the CTO-Mikros column oven. Stable column temperature, essential to retention time reproducibility, is ensured and columns up to 150 mm in length can be accommodated. To preserve the optimal source adjustment, the CTO-Mikros features an innovative snap-in column locking system, the UF-Link.
When using microfow rates, even the smallest of dead volumes can cause significant diffusion and lead to loss of peak shape and sensitivity. Shimadzu’s UF-Link allows any user to correctly install a microflow column without disrupting the ESI spray needle position. A sure-sealing adapter allows the column to lock into the oven and make a zero-dead volume connection with the ESI needle. Any column up to 150 mm in length with standard fittings can be accommodated.

 

Connection Procedure

Attach the adapter to the column
Attach the adapter to the column.
Standard threads on the adapter make
it compatible with a wide variety of
columns.

Place the column in the UF-Link mechanism inside the oven.
Place the column in the UF-Link
mechanism inside the oven.

Complete the connection by swinging over the lever.
Complete the connection by swinging
over the lever.

LC-Mikros™: Innovative Microflow Pump Design

LC-Mikros

Shimadzu LC pumps are the industry standard for long life and high performance. The LC-Mikros solvent delivery pump has completely new direct-drive engineering to deliver micro to semi-micro flow rates ranging from 1 to 500 μL/min. UHPLC system pressure tolerance of 80 MPa (11,600 psi) allows the use of every column type.
The LC-Mikros pump is designed for microflow gradient elution, even at low percentages. In the example below, excellent gradient stability is shown using mobile phase compositions ranging from 1% to 90%. The LC-Mikros delivers stable retention times essential to the chromatographer.

  Average
Retention Time
Standard
Deviation
RSD
Gly-Tyr 5.31 0.009 0.16%
Val-Tyr-Val 7.97 0.006 0.07%
Angiotensin II 9.32 0.015 0.16%
Leu enkephalin 9.71 0.011 0.11%
Met enkephalin 10.5 0.012 0.11%

Flowrate: 5 µL/min
Column:Shim-pack MC C18(0.3 mmID×150 mm)
*Obtained under our specified conditions.

Time (min) 1 11
11.1
13
13.1 25
Concentration B 1% 40% 90% 90% 1% 1%
 

SIL-40C XR: Low-Volume Direct Injection Autosampler

SIL-40C

The SIL-40C XR autosampler delivers you excellent accuracy and reproducibility as well as extremely low carry-over. Its injection volume ranges from 0.1 to 50 μL and your precious sample has never wasted due to the total injection method SIL-40C XR adapted. 
It contributes to produce highly accurate results even if you had to use low injection volume (less than 1 μL). In case of micro flow rate with narrow column, optimum injection volume also gets lowered. It is also difficult to increase the injection volume, especially, if you would use a sample solvent with high elution power. In this case, sample must be diluted to weaken the sample solvents. Highly accurate micro volume injection capability of SIL-40C XR allows you to use samples with high organic solvent contents without dilution.
System volume and gradient delay are minimized with the newly developed “programmable loop cut-off mechanism,” which automatically diverts the sample loop from the flow line using a high-pressure valve as soon as the sample in needle is drained. This is extremely important in minimizing microflow analysis run times.

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