Pre-column chelation liquid chromatographic separation and determination of trace V, Cu, Co, Pd, Fe and Ni

SEPARATION AND DETERMINATION OF TRACE Cu(II), Zn(II), AND Pd(II) AS THEIR TETRAPHENYLPORPHINE CHELATES BY REVERSED-PHASE HIGH PERFORMANCE LIQUID CHROMATOGRAPHY

“…TPP was synthesized and purified according to the method described by Adler et al 8 The final product was proved to be TPP of high purity by Elemental analysis, 1 HNMR, and HPLC. Its absorption spectrum was the same as reported.…”

“…[1][2][3] In many papers, trace metals form stable complexes with inorganic or organic reagents. It is well known that porphyrin is a kind of highly sensitive chromogenic reagent.…”

A sensitive method for determining total vanadium in water samples using colorimetric-solid-phase extraction-fiber optic reflectance spectroscopy

“…The complexes V(V)-H 2 O 2 -PAR and V(V)-H 2 O 2 -(5-Br-PADAP) [18,19] were used in spectrophotometry. [17,[20][21][22][23][24] chelates were applied in vanadium determination by use of HPLC with precolumn derivatization. The V(V)-H 2 O 2 -PAN ternary complex has been previously used in cloud point extraction methodology [4].…”

Simultaneous Spectrophotometric Determination of Cobalt and Nickel by Partial Least Square Regression in Micellar Media

“…The methods reported for the simultaneous determination of nickel and cobalt are AAS using FAAS 3-6 or ETAAS 7-10 , HPLC [11][12] with different techniques such as ion chromatography [13][14][15] , chelation ion chromatography 16,17 , reversed phase liquid chromatography [18][19][20][21][22] , ICP-AES 23,24 , NAA 25 and XRF 26,27 . Electroanalytical techniques [28][29][30] and flow systems with voltammetric 31 detection systems, polarographic 32 methods, gravimetric and colorimetric methods 33 , spectrophotomeric methods [34][35][36][37][38] .…”