{"aspect_id":"AS137","aspect_name":"amount-of-substance-ratio","aspect_reference":null,"aspect_symbol":null,"name":"amount-of-substance-ratio parts per million","scale_id":"SC1358","scale_name":null,"scale_symbol":null,"scale_type":"ratio","symbol":"None ppm","unit_id":"UN1270","unit_name":"parts per million","unit_reference":null,"unit_symbol":"ppm"}