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Optimizing Performance
Optimization for Lowest Carry-over
Optimization for Lowest Carry-over
Several parts of an injection system can contribute to carry-over:
•
needle outside
•
needle inside
•
needle seat
•
sample loop
•
seat capillary
•
injection valve
The autosampler continuous flow-through design ensures that sample loop,
needle inside, seat capillary, and the mainpass of the injection valve is always
in the flow line. These parts are continuously flushed during an isocratic and
also during a gradient analysis. The residual amount of sample remaining on
the outside of the needle after injection may contribute to carry-over in some
instances. When using small injection volumes or when injecting samples of
low concentration immediately after samples of high concentration, carry-over
may become noticeable. Using the automated needle wash enables the
carry-over to be minimized and prevents also contamination of the needle
seat.
Содержание G1329A
Страница 1: ...Agilent 1260 Infinity Preparative Autosampler User Manual...
Страница 6: ...6 Contents...
Страница 22: ...22 1 Introduction to the Autosampler Agilent 1200 Infinity Interfaces...
Страница 32: ...32 2 Site Requirements and Specifications Performance Specifications...
Страница 52: ...52 3 Installing the Autosampler Transporting the Autosampler...
Страница 74: ...74 6 Troubleshooting and Diagnostics Overview of the Sampler s Indicators and Test Functions...
Страница 106: ...106 8 Parts and Materials for Maintenance Main Assemblies Main Assemblies Figure 23 Autosampler Main Assemblies...
Страница 109: ...109 Parts and Materials for Maintenance 8 Analytical Head Assembly Figure 24 Analytical Head Assembly cdi h dlc...
Страница 136: ...136 9 Identifying Cables RS 232 Cables...
Страница 149: ...149 Index...