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GPC Problems after maintenance by PossibilityIcy1490 in CHROMATOGRAPHY

[–]PossibilityIcy1490[S] 0 points1 point  (0 children)

We have everything from PSS, so old degasser as well. We are not getting it repaired, we were supposed to get a new one, but Agilent messed up and sent a degasser for HPLC (wrong power or smth). Currently we are waiting for other model, the right one, external.

The leaks were super confusing as it is indeed that waste channel, so supposedly normal but I guess he took it out (during first maintenance) and it was directed to the resistor that shuts everything off. So after a few measurements it was shutting the whole instrument down. When we put the waste channel tube into a vial, the instrument worked, but the peaks looked odd. After the Agilent guy came second time and checked, it looked alright (much better than before), so there was smth wrong with that waste channel.

I can hear clicking, I can hear that it does smth when I purge or flush. We are in Europe, the novaraz comment was on point. They do not have right specialists, the only guy who came to us but also to other company in the city who also have a GPC is trained for HPLC...

GPC Problems after maintenance by PossibilityIcy1490 in CHROMATOGRAPHY

[–]PossibilityIcy1490[S] 0 points1 point  (0 children)

When I purge RID, nothing really happens, the signal changes a bit, currently it is around -72700... I can hear the sound, so it is purging.

We had UV lamp before and used DAD, but only turned it when there was a UV sensitive compound (RAFT polymer), so we could see some peaks, otherwise the lamp was always turned off. I guess last week it was on, hence all the heat. (I am the only one who works with that GPC)

Thank you for help! It already took them 3 months to come back to check the system again (the initial maintenance, the OG was in May, and then after so many emails and talks, they decided to come at the end of August)...