PENGARUH PH CAIRAN PENYARI TERHADAP KADAR METABOLIT SEKUNDER DALAM EKSTRAK ETANOL BIJI JARAK (Ricinus communis L.)= THE EFFECT OF SOLVENT PH ON SECONDARY METABOLITE CONCENTRATION IN THE ETHANOL EXTRACT OF CASTOR BEANS (Ricinus communis L.) - MUSTIKA, MUSTIKA (2021)