Partition Coefficient - Teledyne Tekmar Versa User Manual

partition coefficient

K= C /C
M G
C = K C
*
M G
C = C /K
G M
K = Partition Coefficient
C = Concentration in the Matrix
M
C = Concentration in the gas phase or the headspace
G
NOTE: Lower K values result in higher concentrations in the gas phase.
patition coefficients of organics from
Water at 50
Compound
Hexane
Benzene
Toluene
Xylene
Methanol
Ethanol
n-Propanol
Acetaldehyde
Acetone
Methylethyl Ketone
Since the equilibrium is a constant, Static Headspace analysis is a quantative technique. The concentration in the gas
phase is directly proportional to the original concentration in the matrix.
V + V - V
G V M
V = Volume of the gas phase
G
V = Volume of the vial
V
V = Volume of the Matrix
M
Versa User Manual
c
o
K
0.015
2.5
2.1
1.3
1670
1150
770
99
190
114
Introduction • Page 1-5
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