Extraction-spectrofluorimetric determination of cadmium with diethyldithiocarbamate and calcein in non-aqueous media

Aznárez, José A.; Galbán, Javier; Diaz, Carmelo; Rabadan, Jose M.

doi:10.1016/s0003-2670(00)85029-1

Cited by 9 publications

(2 citation statements)

References 8 publications

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“…Beryllium was stripped from the column with 1 M hydrochloric acid. Aznarez et al (1987) extracted cadmium with diethyldithiocarbamate into chloroform from pH 11-12 aqueous media containing potassium cyanide and potassium phosphate. Lesny et al (1988) extracted cadmium with diphenyl thiocarbazone at pH.9 into CHCl,.…”

Section: Berylliummentioning

confidence: 99%

Radioanalytical technology for 10 CFR Part 61 and other selected radionuclides: Literature review

Thomas¹,

Thomas²,

Robertson³

1996

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NRC Job Code LlSOSDisclaimer is not a substitute for NRC regulations and compliance is not required.The approaches and/or methods described in this NUREGKR are provided for information only.Publication of this report does not necessarily constitute NRC approval or agreement with the information contained herein. AbstractA.comprehensive l i t e r a t u r e review and assessment was conducted t o identify and evaluate radioanalyti cal techno1 ogy and procedures used for measuring 10CFR61 radionuclides and 'other long-1 ived isotopes. This review evaluated radiochemical procedures currently i n use a t a number of laboratories i n the US, as well as identifying new advanced methods and techniques which-could be adapted for routine radiochemical analyses of low-level radioactive waste. The 10CFR61 radi onucl ides i ncl.ude I4C, 6oCo, 59*63Ni , "Sr, 94Nb, "Tc, '''I, 137Cs, and TRU Isotopes w i t h half-lives greater than five years. The other low-level which may be present i n various types of waste streams from nuclear power stations. radi onucl ides of interest i ncl ude 7-'0Be, 26A1 , 36Cl , 9 3 M~, lw.ll%d, and 121a-126 Sn , 0 ... -.

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Section: Berylliummentioning

confidence: 99%

Radioanalytical technology for 10 CFR Part 61 and other selected radionuclides: Literature review

Thomas¹,

Thomas²,

Robertson³

1996

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“…Reports on some methods using calcein for the fluorometric determination of metal ions , have tended not to include detailed discussions of its composition or the structure of calcein complexes. Perhaps this can be explained in that commercially available calcein usually includes different geometric isomers of calcein. − The large number of impurity peaks in this calcein would have made the ligand unsuitable for separation systems, such as HPLC. Indeed, our own investigation has revealed that the unpurified calcein produces an unavailable chromatogram due to its many unknown peaks.…”

mentioning

confidence: 99%

Chemical Suppression of Contaminant Metal Ions Using a Metastable State in Precolumn Derivatizing HPLC: An Ultratrace Fluorometric Detection of Al(III)

et al. 2005

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The contamination of metal ions from reagents used frequently restricts the practical detection limit of the metal ion, which itself is a source of contamination. We have found a novel solution to this problem, a chemical-suppressing method of contaminant metal ions on a reversed-phase HPLC for Al3+ with a detection limit of 7.6 x 10(-11) mol dm(-3) (2.1 ng dm(-3)) by only adding a certain agent into all stock solutions without any preconcentration or purification steps. This technique decreases the concentration of the contaminant Al3+ originating from the reagents by more than 1 order of magnitude using selective derivatization of sample Al3+ ions to a powerful fluorescent complex at a metastable state in the precolumn chelation processes. Meanwhile, the contaminant Al3+ remains as a nonfluorescent complex with a blocking reagent in order to suppress the contamination. This selective derivatization is achieved by the accumulation of several complexation processes based on the difference of formation, dissociation, and ligand-exchange kinetics and the thermodynamics between the derivatizing reagent, the 4',5'-geometorical isomer of calcein, and the blocking reagent, o,o'-dihydroxyazobenzene. This simple and smart HPLC system was validated through recovery tests of environmental and biological samples.

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Synthesis of β-Cyclodextrin-2,4-dihydroxyacetophenone-phenylhydrazine and Its Application

Liu

Zhang

2005

Jnl Chinese Chemical Soc

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A novel host reagent of b-cyclodextrin-2,4-dihydroxyacetophenone-phenylhydrazine(b-CDP-DHPH) was synthesized and characterized by IR and 1 H NMR spectra. A highly selective and sensitive spectrofluorimetric determination of trace amounts of cadmium was proposed based on the reaction between Cd 2+ and b-CDP-DHPH at pH 10.0. The molar ratio of b-CDP-DHPH to Cd 2+ was 1:1. The linear range of this method was 0.56-120 mg·L -1 with a detection limit of 0.20 mg·L -1 . The interferences of 39 common ions in the determination of cadmium were investigated, and the results showed that the host reagent had a quite high selectivity. This method was rapid and simple in determination of trace amounts of cadmium in mineral, tap and river water.

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Extraction-spectrofluorimetric determination of cadmium with diethyldithiocarbamate and calcein in non-aqueous media

Cited by 9 publications

References 8 publications

Radioanalytical technology for 10 CFR Part 61 and other selected radionuclides: Literature review

Radioanalytical technology for 10 CFR Part 61 and other selected radionuclides: Literature review

Chemical Suppression of Contaminant Metal Ions Using a Metastable State in Precolumn Derivatizing HPLC: An Ultratrace Fluorometric Detection of Al(III)

Synthesis of β-Cyclodextrin-2,4-dihydroxyacetophenone-phenylhydrazine and Its Application

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