Shiva Falahian Shafiei - Department of Pharmacy, Ayatollah Amoli Branch, Islamic Azad University, Amol, IranDepartment of Pharmacy, Ayatollah Amoli Branch, Islamic Azad University,Amol, Iran
Fereshteh Chekin - Department of Chemistry, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran

Cysteamine (β-mercaptoethylamine; CA) bitartrate is a drug approved for the treatment of cystinosis, a rare autosomal recessive disease caused by the abnormal intralysosomal accumulation of the amino acid cysteine with in various tissues [۱]. The specific and sufficiently sensitive analytical method was required for total cysteamine determination in biological and pharmaceutical samples [۲]. The electrochemical methods have the advantages of simplicity, low expense, and high sensitivity. So, electrochemical methods for the determination of CA have received more attention in recent years [۳-۵].

Reduced graphene oxide; MoS۲ nanosheets; Cysteamine; Plasma