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How do you experimentally determine LogP?

Log P and log D were determined by shake flask method, wherein, the compound was partitioned between presaturated noctanol and water phase (water/PBS pH 7.4) and the concentration of compound in each phase was determined by HPLC.

How do you find the partition coefficient?

Hear this out loud PauseThe partition coefficient of a drug may be determined by shaking it with equal parts of two immiscible solvents (the organic layer, which is saturated with water, and the aqueous drug solution) until equilibrium is attained. The content of the drug in one of the layers is determined and the value is calculated.

What does it mean if a drug has an octanol-water partition coefficient greater than 1?

Kow serves as a measure of the relationship between lipophilicity (fat solubility) and hydrophilicity (water solubility) of a substance. The value is greater than one if a substance is more soluble in fat-like solvents such as n-octanol, and less than one if it is more soluble in water.

How do you calculate partition coefficient?

A partition coefficient is the ratio of the concentration of a substance in one medium or phase (C1) to the concentration in a second phase (C2) when the two concentrations are at equilibrium; that is, partition coefficient = (C1/C2)equil.

What is the partition coefficient of octanol-water for DDT?

The molar partition coefficient between either octanol or nine weight percent cetanol in octanol and water is 1051 02 for DDT and 1052 02 for HCB, all at room temperature.

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What is the partition coefficient of mercury in octanol-water?

Hear this out loud PauseThe partition coefficient obtained was 4.150.20 at 298 K; it slightly decreased from 4.80 to 3.80 as the temperature rose from 278 to 308 K.

What is the partition coefficient of octanol-water?

Hear this out loud PauseDefinition: The octanol/water partition coefficient (Kow) is defined as the ratio of a chemicals concentration in the octanol phase to its concentration in the aqueous phase of a two-phase octanol/water system. Values of Kow are thus, unitless.

What is considered a high Kow?

Substances with high logKow values tend to adsorb more readily to organic matter in soils or sediments because of their low affinity for water (see Kd/Koc). Chemicals with very high logKow values (i.e, 4.5) are of greater concern because they may have the potential to bio-concentrate in living organisms.

How do you measure octanol-water partition coefficient?

Therefore, their formula for estimating the octanolwater partition coefficient is:(5) log P= i n i a i where ni is the number of atoms of type i, and ai is the contribution of the corresponding atom type.

What is the partition coefficient of bisphenol A octanol-water?

Hear this out loud PauseThis ratio is the concentration of a chemical in octanol, commonly used as an organic solvent, and water at equilibrium (United States Geological Survey 2008). The log Kow value for BPA varies from 2.2 to 3.4 (see figure A:3 for additional properties).

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