"Concentration of L-valine (water insoluble and hydrolysable) {CAS 72-18-4} per unit volume of the atmosphere [aerosol >GF/F phase] by filtration, water leaching, acid hydrolysis of the residue and high performance liquid chromatography (HPLC)"@en . . "SDN:P01::CONVALL3" . "Unavailable"@en . .