Determination of partition coefficients from surface acoustic wave vapor sensor responses and correlation with gas-liquid chromatographic partition coefficients

Journal Article · Sun May 01 00:00:00 EDT 1988 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00160a010· OSTI ID:6862046

Grate, J W; Snow, A; Ballantine, Jr, D S; Wohltjen, H; Abraham, M H; McGill, R A; Sasson, P

Surface acoustic wave (SAW) devices coated with a thin film of a stationary phase sense chemical vapors in the gas phase by detecting the mass of the vapor that distributes into the stationary phase. This distribution can be described by the partition coefficient. An equation is presented that allows partition coefficients to be calculated from SAW vapor sensor frequency shifts. The experimental responses of fluoropolyol-coated 158-MHz dual delay line SAW vapor sensors are converted to partition coefficients by this method, and these results are compared with partition coefficients determined by gas-liquid chromatography. These two methods rank the vapors in the same order of increasing sorption, but individual partition coefficient values are not always in precise agreement. The influence of temperature and gas-phase vapor concentration on vapor sorption is also examined.

• Research Organization: Naval Research Lab., Washington, DC (USA)
• OSTI ID: 6862046
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 60:9; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
500100 -- Environment
Atmospheric-- Basic Studies-- (-1989)
54 ENVIRONMENTAL SCIENCES
ACOUSTIC MEASUREMENTS
DATA
EQUATIONS
EXPERIMENTAL DATA
FILMS
FLUIDS
FUNCTIONS
GASES
INFORMATION
NUMERICAL DATA
PARTITION FUNCTIONS
PREDICTION EQUATIONS
QUANTITY RATIO
SORPTION
TEMPERATURE DEPENDENCE
THIN FILMS
VAPORS