%0 Journal Article %T Design of novel and modified dual optode membrane based on carbon dots for both ultratrace copper(ii) and cobalt(ii): derivative spectrophotometric and central composite design study %A Shahamirifard, Seyed Alireza %A Ghaedi, Mehrorang %J NJC: New Journal of Chemistry %V 42 %N 4 %P 2590-2604 %@ 1144-0546 %D 2018-02-12 %I The Royal Society of Chemistry %~ DeepDyve