An MS related Issue.

Hi Das.Vishnu welcome to the Community! 

I moved your question to the LC/MS Forum for better visibility.  Can you please provide more information about your system - the hardware/software configuration?

Cheers,

Kristen

This message suggests that there is insufficient ion signal for Optimizer to operate properly. 

Do you know at which point this in the optimization process that this error occurs (MS2SIM, Product Ion, MRM)? Based on this, it seems like Product ion or MRM. 

It likely means that the product ion(s) selected is not being detected or has low abundance. I would observe the optimization process and if necessary, attempt this step manually and confirm that the product ion is suitable. 

Exactly. The product ions has very low abundance. The optimiser is in the MRM mode.  So you suggest scaning the product and parent separately in the acquisition window and not in the optmiser. 

Yes, you could confirm the precursor ion and product ion(s) in acquisition outside of Optimizer first. 

If you confirm the precursor and product ion(s), rerun optimizer and monitor at which point it errors. If it is due to low abundance. injecting a higher volume may help address the issue. 

Ok. Will try out that.

Is there any general rule for CE and Fragmentation voltage range. We are doing pesticides mostly and optimisation is run at 

0-60 ce and 50-250 frag voltage. 

We are dealing with masses ranging from 100- 1000.

Ok. Will try out that.

Is there any general rule for CE and Fragmentation voltage range. We are doing pesticides mostly and optimisation is run at 

0-60 ce and 50-250 frag voltage. 

We are dealing with masses ranging from 100- 1000.