Dachun Zhang wrote:

> Anybody can suggest a better syringe wash solvent for TC/EA water 
> injection? Our syringe gets jammed in about 130 injections when methanol 
> is used.

We modified the waste position on our H/Device with a "vacuum dryer" (a 
metal cylinder with septa on top connected to an old rotary vane pump).
We clean the syringe with methanol and inject the methanol into the 
vacuum line. For seawater we found that 3 wash cycles are enough, for 
higher salinities we used to go for 6 cylces.

I tested aceton and ethanol instead of methanol. I got the impression 
that the syringe runs more "smoothly" with methanol than with aceton. 
However, this is not proved by any objective test result.

regards,
Robert



-- 
Dr. Robert van Geldern
Section 3: Geochronology and Isotope Hydrology
Leibniz Institute for Applied Geosciences (GGA-Institute)

GEOZENTRUM HANNOVER
Stilleweg 2
30655 Hannover, Germany

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