Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Comparison of chromatographic peak areas for acetic acid and furfural emitted by cellulosic samples (Whatman filter paper no.1) impregnated with different phosphate buffers after an 18-h annealing period in a glass vial and equilibrium pH of the same samples. Conditions of extraction using SPME fibre: 40 °C, 1 h. Typical relative standard deviation in determination of log(A) was <5%.
