"Concentration of D-valine (water insoluble and hydrolysable) {CAS 640-68-6} 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::CONVALD3" . "Unavailable"@en . .