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When injecting, no sample is introduced

Applies to

ALEXYS or ROXY LC system, AS 100/110 autosampler


No or too small signal/front peaks visible in chromatogram.


Blockage of AS 100/110 flow path or leakage in the injection valve.

Diagnosis and Remedy

Follow the trouble-shoot instructions in the flow diagram below.


See also: 'no signal' for detector related issues.


Article ID: 01077

Last reviewed: 15 apr 2010