Naked-eye determination of oxalate anion in aqueous solution with copper ion and pyrocatechol violet.
A novel strategy for the determination of oxalate anions was successfully established using a copper ion and pyrocatechol violet (PV) ensemble. The sensor ensemble can discriminate oxalate over other common anions including F(-), Cl(-), I(-), Br(-), HPO(4)(2-), PO(4)(3-), AcO(-), CO(3)(2-), SO(4)(2-), ClO(4)(-), P(2)O(7)(4-), S(2-) (deposited by Ag(+)), CN(-) (shielded by Fe(3+)) and can detect oxalate at low microgram levels in quasi-physiological aqueous solutions. The detection of the oxalate anion gives rise to a rapid observable visual color change from blue to yellow.
Su
Jing
J
Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Molecular Science, Shanxi University, Taiyuan, 030006, China.
Sun
Yuan-Qiang
YQ
Huo
Fang-Jun
FJ
Yang
Yu-Tao
YT
Yin
Cai-Xia
CX
D001557:Benzenesulfonates / Q000737:chemistry*; D003116:Color; D003300:Copper / Q000737:chemistry*; D007477:Ions / Q000737:chemistry; D015394:Molecular Structure; D019370:Observation; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D010070:Oxalates / Q000032:analysis*; D012996:Solutions; D018724:Spinacia oleracea / Q000737:chemistry; D014785:Vision, Ocular; D014867:Water / Q000737:chemistry*
D001557:Benzenesulfonates; D007477:Ions; D009942:Organometallic Compounds; D010070:Oxalates; D012996:Solutions; D014867:Water; C009134:pyrocatechol violet; D003300:Copper