A method for separating, recovering, and purifying tetrahydrocannabinolic acid (THCA) from an organic solvent solution comprising a mixture of cannabinoids, said method comprising: providing an organic solvent solution containing therein a complex mixture of cannabinoids; assaying the organic solvent solution to determine a first concentration of THCA therein; adding to the organic solvent a volume of a first organic solvent selected from pentane, hexane, and heptane, and commingling therewith to adjust the first THCA concentration to a target concentration value selected from a range of target concentrations, thereby producing a solvent-solubilized solution; adding a selected amine to the solvent-solubilized solution and commingling therewith to precipitate therefrom a THCA-amine salt, wherein said amine is: a diamine selected from one of 1,8-diazabicyclo[5.4.0]undec-7-ene, 1,5-diazabicyclo[4.3.0]non-5-ene, 1,4-diazabicyclo[2.2.2]octane (DABCO), and tetramethylethylenediamine (TMEDA), or an amino alcohol selected from one of dimethylethanolamine (DMEA), and piperidineethanol, or a tertiary amine selected from one of triethylamine, ethyldiisopropylamine (Hunig's base), and quinine; washing the precipitated THCA-amine salt at least once with said first selected organic solvent and then drying the washed THCA-amine salt; dissolving the THCA-amine salt in a selected second organic solvent and commingling therewith; adding a volume of a selected antisolvent to the dissolved THCA-amine salt and commingling therewith to thereby recrystallize the THCA-amine salt therefrom; and washing the recrystallized THCA-amine salt at least once with said selected antisolvent to produce a purified THCA-amine salt, and then drying the purified THCA-amine salt. providing an organic solvent solution containing therein a complex mixture of cannabinoids; assaying the organic solvent solution to determine a first concentration of THCA therein; adding to the organic solvent a volume of a first organic solvent selected from pentane, hexane, and heptane, and commingling therewith to adjust the first THCA concentration to a target concentration value selected from a range of target concentrations, thereby producing a solvent-solubilized solution; adding a selected amine to the solvent-solubilized solution and commingling therewith to precipitate therefrom a THCA-amine salt, wherein said amine is: a diamine selected from one of 1,8-diazabicyclo[5.4.0]undec-7-ene, 1,5-diazabicyclo[4.3.0]non-5-ene, 1,4-diazabicyclo[2.2.2]octane (DABCO), and tetramethylethylenediamine (TMEDA), or an amino alcohol selected from one of dimethylethanolamine (DMEA), and piperidineethanol, or a tertiary amine selected from one of triethylamine, ethyldiisopropylamine (Hunig's base), and quinine; washing the precipitated THCA-amine salt at least once with said first selected organic solvent and then drying the washed THCA-amine salt; dissolving the THCA-amine salt in a selected second organic solvent and commingling therewith; adding a volume of a selected antisolvent to the dissolved THCA-amine salt and commingling therewith to thereby recrystallize the THCA-amine salt therefrom; and washing the recrystallized THCA-amine salt at least once with said selected antisolvent to produce a purified THCA-amine salt, and then drying the purified THCA-amine salt. a diamine selected from one of 1,8-diazabicyclo[5.4.0]undec-7-ene, 1,5-diazabicyclo[4.3.0]non-5-ene, 1,4-diazabicyclo[2.2.2]octane (DABCO), and tetramethylethylenediamine (TMEDA), or an amino alcohol selected from one of dimethylethanolamine (DMEA), and piperidineethanol, or a tertiary amine selected from one of triethylamine, ethyldiisopropylamine (Hunig's base), and quinine; washing the precipitated THCA-amine salt at least once with said first selected organic solvent and then drying the washed THCA-amine salt; dissolving the THCA-amine salt in a selected second organic solvent and commingling therewith; adding a volume of a selected antisolvent to the dissolved THCA-amine salt and commingling therewith to thereby recrystallize the THCA-amine salt therefrom; and washing the recrystallized THCA-amine salt at least once with said selected antisolvent to produce a purified THCA-amine salt, and then drying the purified THCA-amine salt.