{"aspect_id":"AS135","aspect_name":"mass-ratio","aspect_reference":null,"aspect_symbol":null,"name":"mass-ratio milligram per kilogram","scale_id":"SC1741","scale_name":null,"scale_symbol":null,"scale_type":"ratio","symbol":"None mg.kg-1","unit_id":"UN1654","unit_name":"milligram per kilogram","unit_reference":null,"unit_symbol":"mg.kg-1"}