1M Tris-HCl,pH6.8

Tris hydrochloride at a pH of 6.8 and a concentration of 1 M is commonly used in various applications. It serves as an essential component in extraction buffers for DNA or RNA, such as phenol extraction. Additionally, Tris hydrochloride finds application in the characterization of in vitro translation products through SDS-PAGE, where it is included in separating and stacking gels.
The pH values of Tris buffer solutions vary based on temperature and concentration. For temperatures ranging from 5 °C to 25 °C, a decrease in temperature by 1 °C leads to an average increase of 0.03 pH units. Conversely, when the temperature rises from 25 °C to 37 °C, the pH decreases by an average of 0.025 units per °C. These temperature-dependent changes need to be considered when using Tris buffer solutions.
Furthermore, altering the concentration of Tris in the buffer solution also affects the pH value. Increasing the concentration from 0.05 M to 0.5 M results in a pH increase of approximately 0.05 units. Conversely, decreasing the concentration from 0.05 M to 0.005 M leads to a pH decrease of approximately 0.05 units.
It is important to keep these temperature and concentration dependencies in mind while working with Tris buffer solutions, as they can significantly impact the pH and subsequently affect experimental results.