IN VITRO STUDIES FURTHER DETAILS
In Vitro Study No: 752
METHODS
Chemical
Conc. (mg/ml)
Volume (ml)
Loading (mg/cm2)
Vehicle
Species
Membrane
Site
Area (cm2)
Cell Type
Receptor Fluid
Temp. (oC)
Temp. Measured
Exposure Time (h)
Study Length (h)
Occluded
Analytical Method
Paraoxon
1.28
0.01
0.04
Ethanol
Pig
Dermatomed to 0.5mm
Dorsal
0.32
Flow-through
Kreb's-Ringer bicarbonate buffer & BSA
37
Receptor Fluid
8
8
2
Radiolabelled (14C) + HPLC
RESULTS
% Recovery
+/-
% In Stratum Corneum
+/-
% in Viable Skin
+/-
% Penetrated
+/-
% Absorbed
+/-
s-s-flux (mcrg/cm2/h)
+/-
kp (cm/h)
n
Lag Time (h)
9.38
2.9
4
NOTES
Weanling Pigs were used. The HPLC was used to determine the % of absorbed chemical that existed as metabolites
REFERENCE
Percutaneous Absorption Of Parathion And Its Metabolites, Paraoxon and P-Nitrophenol, Administered Alone Or In Combination:In Vitro Flow-through Diffusion Studies (1994) Pestic. Biochem. Physiol., 48 :56-62