Does anyone out there test their cartons of saline /immusol or whatever product they are using, for Ph? After being in storage in warehouses, heat etc., we found occasionally we would get a lot in that's Ph had dropped to 5.5 or 6.0. We thought this was important since the lower Ph can cause Kidd antibodies to be missed! We tested it upon opening the carton and documented...another QA monitoring issue!

We routinely add Phix to our saline before we use it to buffer it.

We don't check the pH of our BB Saline any more. Since the advent of gel cards, we do little tube washing, mainly for Weak D or DAT testing.

A note on the side of our box warns that a proper environment (15-30 C) is necessary for product stability. Perhaps the warehouse cannot maintain storage conditions ...