Skip to main content
Waters

Does pH change (shift) inside a glass vial over time if a sample is kept in an unbuffered aqueous solution? - WKB198883

Article number: 198883

ENVIRONMENT

  • Glass vials

ANSWER

Yes

ADDITIONAL INFORMATION

Glass is inorganic with a certain level of free ions. In the manufacturing process, the ions can bloom and be in higher concentration on the surface. 
The ions can solvate and go into solution in an aqueous sample. Solvating the ions can raise the pH of the sample.

The glass vials used in the Waters TruView LCMS Certified Vials product line are manufactured using tightly controlled process limits. The process yields a glass surface that has a lower concentration of free ions on the surface.

See: Waters TruView LCMS Certified Sample Vials Technical White Paper

id198883,

Not able to find a solution? Click here to request help.