I have noticed in a recent thread that there has been discussion about the need for Buffered Saline in small quantities.

The company that I work for, Hemo bioscience, offers a phosphate buffered saline concentrate. Our PBS concentrate is a 25X liquid concentrate designed specifically for blood banking with 4 year expiry dating and stored at room temperature. You reconstitute it with DI water from your lab and it is ready to use with pH of 7.00 +/- 0.05 and osmolarity of 290 +/- 5. Also, the package insert indicates that the reconstituted product has a 4 month shelf life. This product has a Green advantage- low cost of shipping, less fuel used in transport. Also if you currently buy and store bulk saline, this concentrate takes up 25X less space. It is available in 4 sizes:

40 mL (1L PBS)

200 mL (5L PBS)

400 mL (10L PBS)

800 mL (20L PBS)

You can make up as much or as little as you need at a time, the remainder of the concentrate will maintain the original shelf life. For example, if your lab purchased the 200mL size and made it up 1L at a time, the remainder of the concentrate would maintain the original 4 year expiry dating.

If you are interested, I can send you more information on this and our other blood bank reagents.

My email is j.lowery@hemobioscience.com

Thanks,

Jimmy Lowery

Technical Sales Manager

Hemo bioscience

Thanks for the info, what QC would we need to do after reconstituting?

Thanks for your interest in our Phosphate Buffered Saline Concentrate. QC would depend on the individual laboratory and the procedures in place. At a minimum, we recommend a pH measurement. You could also measure the osmolarity if you have access to an osmometer.

Please let me know if you have any other questions or require further information.