Ion-Pair High-Performance Liquid Chromatographic Retention Behavior of Copper(II)–1-Oxa-4,7,10,13- tetraazacyclopentadecane Complex

Chung, Yoo Seung; Kim, Bongjoon; Hwang, Jun Gi; Kim, Chang-Suk

doi:10.1006/mchj.1999.1739

Cited by 3 publications

(6 citation statements)

References 16 publications

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“…This pheomenon was explained in earlier studies. 11,19 The MeCN percentage in mobile phase was limited from 20 to 30%, because the k values of the TAR and 5MTAR were so large when MeCN percentage in mobile phase was less than 20%, and the peak by ligand (TAR or 5MTAR) overlapped with that of metal-chelate(Co(II)-TAR or Co(II)-5MTAR) when MeCN in mobile phase was more than 30%.…”

Section: Resultsmentioning

confidence: 99%

“…Capillary-HPLC system was introduced in our previous study. 11 Column and detector which were different from the former apparatus 11 were a Vydac C4 capillary column (300 µm(i.d.) × 15 cm(L), 5 µm particle, LC Packings, Netherlands) (denoted as 'C4' hereafter) and a Wellchrom K-2501 UVvisible spectrophotometric detector made by Knauer Co. (Germany, cell volume: 70 nL).…”

Section: Methodsmentioning

confidence: 99%

“…The above metal solutions and 2.00 mM TAR or 5MTAR solution dissolved in 50%(v/v) MeCN-water mixtures were used to prepare 2.0 × 10 Each components dissolved in an injected sample solution was eluted through the C 4 with the above mobile phase. The k values of the compounds were calculated by the following equation 4,11 …”

Section: Methodsmentioning

confidence: 99%

“…But, separation and simultaneous determination of mixtures of metal ions as their metal-chelates with an organic chelating reagent by reversed-phase high-performance liquid chromatography (RP-HPLC) had been accepted in inorganic analysis in recent years. [4][5][6][7][8] The organic chelating reagents, were 4-(2-pyridylazo)-resorcinol(PAR), 8,9 4-(2-thiazolylazo)-resorcinol (TAR), 4,7 2-(2-thiazolylazo)-p-cresol(TAC), 10 1-oxa-4,7,10,13-tetraazacyclopentadecane (OTAP), 11 and 2-(5-bromo-2-pyridylazo)-5-[N-propyl-N-(3-sulfopropyl)amino]phenol (5BrPSAA), 5 etc. TAR is the one of the popular chelating reagents.…”

Section: Introductionmentioning

confidence: 99%

“…Although metal ion determination with preconcentration processes were reported, 8,9,11,16,17 it was not applied in this study. The objective of this study was selective separation and determination of Co(II) ion as Co(II)-4-(2-thiazolylazo)-resorcinol chelate(Co(II)-TAR) or Co(II)-5-methyl-4-(2-thiazolylazo)resorcinol chelate(Co(II)-5MTAR) by RPCapillary-HPLC.…”

Section: Introductionmentioning

confidence: 99%

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Determination of Co(II) Ion as a 4-(2-Thiazolylazo)resorcinol or 5-Methyl-4-(2-thiazolylazo)resorcinol Chelate by Reversed-Phase Capillary High-Performance Liquid Chromatography

Chung¹,

Chung²

2003

Bulletin of the Korean Chemical Society

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Determination of Co(II) ion as a 4-(2-thiazolylazo)resorcinol(TAR) or 5-methyl-4-(2-thiazolylazo)resorcinol (5MTAR) chelate was accomplished by reversed-phase capillary high-performance liquid chromatography (RP-Capillary-HPLC) using a Vydac C 4 column and MeCN-water mixture as mobile phase. The effect of change in pH and MeCN percentage of the mobile phase on the retention factor, k and peak intensity were evaluated. It was found that 30% MeCN (v/v) of pH 5.60 or 7.20 was adequate as mobile phase when TAR or 5MTAR is used. Detection limit (D.L., S/N=3) in each case was 2.0 × 10 −7 M (11.8 ppb) and 3.0 × 10 −7 M (17.7 ppb). The Co(II) ion in mineral and waste water was determined with the optimum column and mobile phase.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Determination of Co(II) Ion as a 4-(2-Thiazolylazo)resorcinol or 5-Methyl-4-(2-thiazolylazo)resorcinol Chelate by Reversed-Phase Capillary High-Performance Liquid Chromatography

Chung¹,

Chung²

2003

Bulletin of the Korean Chemical Society

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Separation and determination of eleven environmental protection agency priority phenols by reversed-phase capillary high-performance liquid chromatography with indirect fluorophotometric detection and solid phase extraction

Chung

Lee

2001

Microchemical Journal

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Determination of Total Phenols in Environmental Waters by Capillary-HPLC with U.S.E.P.A. Classified Eleven Priority Pollutant Phenols after Nitrosation and Their Visible Spectrophotometric Detection

Chung

2005

Bulletin of the Korean Chemical Society

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The determination of total phenols was accomplished by capillary-high performance liquid chromatography (capillary-HPLC) after nitrosation of the U.S.E.P.A. classified 11 priority pollutant phenols, using the nitrosated parent phenol (POHNO) as a reference for calibration. The optimum mobile phase composition for this analysis was found by examining the effect of changing the percentage of acetonitrile (MeCN) in the mobile phase on retention factors (k values) and peak intensities. As MeCN percentage was increased, k values were reduced and peak intensities were generally increased. From the results obtained, it was found that the optimum mobile phase was 90%(v/v) MeCN solution at pH 8.0, the detection wavelength of 400 nm, and a detection limit (D.L., concentration at signal to noise ratio (S/N) of 3.0) of 4.5 × 10 −7 M. In addition, 10 of the 11 phenols present in mineral or waste water were separated after the nitrosation by capillary-HPLC. The optimum mobile phase for separation was a 40%(v/v) MeCN solution at pH 5.0.

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Ion-Pair High-Performance Liquid Chromatographic Retention Behavior of Copper(II)–1-Oxa-4,7,10,13- tetraazacyclopentadecane Complex

Cited by 3 publications

References 16 publications

Determination of Co(II) Ion as a 4-(2-Thiazolylazo)resorcinol or 5-Methyl-4-(2-thiazolylazo)resorcinol Chelate by Reversed-Phase Capillary High-Performance Liquid Chromatography

Determination of Co(II) Ion as a 4-(2-Thiazolylazo)resorcinol or 5-Methyl-4-(2-thiazolylazo)resorcinol Chelate by Reversed-Phase Capillary High-Performance Liquid Chromatography

Separation and determination of eleven environmental protection agency priority phenols by reversed-phase capillary high-performance liquid chromatography with indirect fluorophotometric detection and solid phase extraction

Determination of Total Phenols in Environmental Waters by Capillary-HPLC with U.S.E.P.A. Classified Eleven Priority Pollutant Phenols after Nitrosation and Their Visible Spectrophotometric Detection

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