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IN VIVO STUDIES FURTHER DETAILS

In Vivo Study No: 203

METHODS

Chemical	Membrane	Concentration mg/ml	Concentration mg/ml	loading (mg/cm2)	Species	Site	Area (cm2)	Occluded?	Exposure Time (h)	Analytical Method
Parathion	10	142.5		Macrogel	Pig	Back		2	240	Gas Chromatography

RESULTS

Length of Study (h)	% Recovery	+/-	Dose remaining on surface (mg)	% remaining on Surface	Dose remaining in stratum corneum (mg)	% remaining in stratum corneum	Dose remaining in the viable skin	% remaining in the viable skin	Amount Absorbed (mg)	% Absorbed	+/-	% Absorbed
240									66.263	4.65		4.65

Length of Study (h)

% Recovery

+/-

Dose remaining on surface (mg)

% remaining on Surface

Dose remaining in stratum corneum (mg)

% remaining in stratum corneum

Dose remaining in the viable skin

% remaining in the viable skin

Amount Absorbed (mg)

% Absorbed

+/-

% Absorbed

240

66.263

4.65

Maximal Flux (mcrg/cm2/h)	Average Flux (mcrg/cm2/h)	+/-	Time Plasma/Blood Levels Peaked (h)	Peak Blood Concentration (mg/l)	n	kp (cm/h)	Lag Time (h)
			10.5	0.01025	4

NOTES

OP's were extracted from plasma using hexane containing ethion as the internal standard. 2 Pigs were used and 2 experiments on each pig. Dose was given as 50mg/kg and the Pigs weighed 28.5kg. They gave the % Absorption (Bioavailability) as 3.9-5.4. I have entered the median of this into the database. AUC (microm.g.h/l) was given as 596-599 Cmax (peak blood concentration ) was given as 9.8-10.7 microg/lTmax was given as 6-15h. Again I have entered the median of this into the database

REFERENCE

Percutaneous Absorption of Organophosphorus Insecticides In Pigs. The Influence Of Different Vehicles (1993) J. Vet. Pharmacol. Therapeut., 16 :174-180