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,