iProcurement particular Items need to be disabled

Hi, 

I understand we can restrict the item categories in iProcurement.But Is there a way to restrict particular items in iProcurement. We do not want to disable that item categories.
We need to disable particular items in iProcurement.

Note: Those Items we need it in core Purchasing but we want to disable those items only in iProcurement.

Please let me know is it possible to do that?

Regards,

Divya