Agilent Technologies G1367A Reference Manual page 35

Closing mats with adhesive can give some contamination in the system. The
WA RN ING
adhesive is soluble in most of the solvents used in HPLC.
In general do not use closing mats with adhesive. The sampler has no prepunch
WA RN ING
needle, therefore the adhesive will clog the needle after several injections.
1100 Series WS MWS Reference Manual
Installing the Sampler
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