[Simultaneous determination of ammonium thiocyanate and its isomeride by dual wavelength multiplication subtractive spectrophotometry].
A method was purposed for simultaneous determination of ammonium thiocyanate and its isomeride thiourea by dual wavelength multiplication subtractive spectrophotometry. The approach was based on the measurement of the absorbance of both standard solutions and mixture samples at 216 and 236 nm. The concentration of ammonium thiocyanate and thiourea was obtained through the calculation of balancing coefficient and slope. The method was successfully applied to the determination of ammonium thiocyanate and thiourea, which existed in isomerization reaction. A comparison was also made with the dual wavelength method and reversed ion-pair chromamotography, and the dual wavelength multiplication subtractive spectrophotometry offered the advantages of simple, rapid and accurate determination.
Pang
Xiu-yan
XY
College of Chemistry and Environmental Sciences, Hebei University, Baoding 071002, China.
Sun
Han-wen
HW
Wang
Ting
T
D007536:Isomerism; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*; D013696:Temperature; D013861:Thiocyanates / Q000032:analysis*; D013890:Thiourea / Q000032:analysis*
D013861:Thiocyanates; C026976:thiocyanic acid; D013890:Thiourea