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- Posts: 101
- Joined: Wed Sep 12, 2007 12:20 pm
- Location: italy
I would like to know if anyone has noted increase frequency in source cleaning on 5975 msd compared to 5973 and older machine
We have a 5975 coupled with p&t with IS area problems: the 1,4 diclorobenzene-d4 has low recoveries on blank sample compared to cv (more than 50% less area) and source cleaning solve problem.
Even if tune ratio are perfect, source is bright and seems clean. The frequency is quite inacceptable, cause we need to clean source after 7-10 days of work, sometimes less (water sample).
Generally speaking, all the precaution possible was taken: desorb time 1min, spli ratio 60:1. purge e trap line cleaned/refurbed with new one, inj maintenace performed. No leak on system.
I suspect water is main problem, and I.m going to install water trap before rough pump, but I like to know if anyone has same issue on 5975 (and also newer models)
Thank you in advance.
daniele
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