Phosphate Buffer

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PBS is the acronym for phosphate buffered saline. Phosphate buffer is one of the most common buffers used in biological research.  The phosphate serves as a buffer to keep the pH constant, while the saline is referencing the osmolarity.  Additional ions such as Ca2+ or Mg2+ , energy sources like glucose, or chelators such as EDTA can be added based on the specific needs of the experiment.

There are many different formulations of PBS, based on the cell type and needs.  The most common, from Cold Spring Harbor is shown below, providing a pH of 7.4 with an osmolarity to normal human cells.

Phosphate Buffer

 

 

Tim Bushnell

Tim Bushnell

I enjoy answering paradigm-shifting questions and trouble-shooting puzzling glitches. I also like finding new ways to enhance old procedures. I’m passionate about my professional relationships and strive to fill them with positive energy.

My other passions include grilling, wine tasting, and real food. To be honest, my biggest passion is flow cytometry, which is something that Carol and I share. My personal mission is to make flow cytometry education accessible, relevant, and fun. I’ve had a long history in the field starting all the way back in graduate school.
Tim Bushnell
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About Tim Bushnell

I enjoy answering paradigm-shifting questions and trouble-shooting puzzling glitches. I also like finding new ways to enhance old procedures. I’m passionate about my professional relationships and strive to fill them with positive energy. My other passions include grilling, wine tasting, and real food. To be honest, my biggest passion is flow cytometry, which is something that Carol and I share. My personal mission is to make flow cytometry education accessible, relevant, and fun. I’ve had a long history in the field starting all the way back in graduate school.

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