COVID-19(5) Analysis(5) quantification(4) parameters(4) parameter(4) linear(4) Concentration(4) required(4) Graphene derivatives(3) clinical analysis(3) suggested(3) medical treatment(3) limit of detection(3) pandemic of COVID-19(3) approved(3) Favipiravir(3) COVID 19(3) Quality control(3) platform(3) Real sample analysis(3) limit(3) Treatment(3) virus(3) plasma(3) Health Organization(3) drug(3) Patient(3) medication(3) dosage(3) Antiviral(3)