Hello, I am using a piece of equipment at our lab that is made of 316 SS. We use this machine to disrupt cells as part of a research program. We prime this "high-pressure emulsifier" with 0.9% normal saline and then switch to our emulsion ingredients. Following production, we then clean the machine with water-for-injection (WFI) and then store it filled with 99% isopropyl.
We are finding "rouging" (the reddish color) on our wetted parts. From what I can tell, this seems to be coming from either the saline, or the fact that the WFI has CO2 in it. These are brief parts of the process, however. It sits in the lab filled with 99% isopropyl for weeks.
Anyone have any insight into what may be causing this phenomenon? We had JUST had the machine's wetted surfaces resurfaced, so we were hoping to be all set. It's back.
Many thanks from a new member,