RID stabilizes and destabilizes around 10 mins after

Hi

You can flush the system with low flow whole night and then check.

I assumed degasser , mobile phase( not contaminted)and temp. control are okay.

Optical balance later.

And after this, still problem, then you have to contact your local agilent support to check optical unit.

Hi,

Do you still have this problem?

Your flow cell could still be contaminated and one option to decontaminate is to use a syringe with water and carefully insert it directly into the flow cell when it is both in recycle mode and (the other one). You might need to repeat it  2 or 3 times. Be careful to not contaminate it again when replacing the solvent.

Regards,