Ion chromatography of heavy and transition metals by on- and post-column derivatizations

Ding, Xin; Mou, Shaoshuai; Liu, Kena; Siriraks, Archava; Riviello, John

doi:10.1016/s0003-2670(99)00798-9

Cited by 40 publications

(13 citation statements)

References 13 publications

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“…, and also Hg 2+ . 12,18,19 The detection limits using this method were 25 ppb for most of the metals.…”

Section: Metal Speciationmentioning

confidence: 88%

“…The mobile phase consisted of 3 mM pyridine-2,6-dicarboxylic acid, 4.2 mM LiOH monohydrate, 3 mM sodium oxalate, sodium sulfate. 12 The cations were detected using UV-visible detector at 535 nm after a postcolumn derivatization with two different derivatization reagents 4-2 (2-pyridylazo) resorcinol (PAR) and 2-[(5-bromo-2-pyridyl)-azo]-5-diethyl-aminophenol (5-Br-PADAP). 12 The anion analysis was performed on a Dionex DX-80 anion chromatographic analyzer equipped with a 10-µL sample loop, a membrane eluent suppression system, and AG14/AS14A guard and separation columns.…”

Section: Determination Of Inorganicsmentioning

confidence: 99%

“…The mobile phase employed in both methods is based on the formation of anion complexes with pyridine-2-6-dicarboxylic acid. 12,[17][18][19] Because of higher sensitivity, the derivatization with spectrophotometric postcolumn reagents allowing for the UV-Vis detection was employed.…”

Section: Metal Speciationmentioning

confidence: 99%

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Advanced Fine Particulate Characterization Methods

Benson¹,

Kong²,

Azenkeng³

et al. 2007

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; phone orders accepted at (703) 487-4650. BASE SUBTASK 2.10 ADVANCED FINE PARTICULATE CHARACTERIZATION ABSTRACTThe characterization and control of emissions from combustion sources are of significant importance in improving local and regional air quality. Such emissions include fine particulate matter, organic carbon compounds, and NO x and SO 2 gases, along with mercury and other toxic metals. This project involved four activities including Further Development of Analytical Techniques for PM 10 and PM 2.5 Characterization and Source Apportionment and Management, Organic Carbonaceous Particulate and Metal Speciation for Source Apportionment Studies, Quantum Modeling, and High-Potassium Carbon Production with Biomass-Coal Blending. The key accomplishments included the development of improved automated methods to characterize the inorganic and organic components' particulate matter. The methods involved the use of scanning electron microscopy and x-ray microanalysis for the inorganic fraction and a combination of extractive methods combined with near-edge x-ray absorption fine structure to characterize the organic fraction. These methods have direction application for source apportionment studies of PM because they provide detailed inorganic analysis along with total organic and elemental carbon (OC/EC) quantification.Quantum modeling using density functional theory (DFT) calculations was used to further elucidate a recently developed mechanistic model for mercury speciation in coal combustion systems and interactions on activated carbon. Reaction energies, enthalpies, free energies and binding energies of Hg species to the prototype molecules were derived from the data obtained in these calculations. Bimolecular rate constants for the various elementary steps in the mechanism have been estimated using the hard-sphere collision theory approximation, and the results seem to indicate that extremely fast kinetics could be involved in these surface reactions. Activated carbon was produced from a blend of lignite coal from the Center Mine in North Dakota and sunflower hulls for the biomass material to be carbonized. The ability to remove mercury from a bituminous coal's derived flue gas was low. Removals of only 15% were attained while injecting 6 lb/Macf of activated carbon upstream of an electrostatic precipitator. Poisoning of sites on the activated carbon by SO 2 and SO 3 contributed to the poor mercury capture performance.

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“…, and also Hg 2+ . 12,18,19 The detection limits using this method were 25 ppb for most of the metals.…”

Section: Metal Speciationmentioning

confidence: 88%

Section: Determination Of Inorganicsmentioning

confidence: 99%

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Advanced Fine Particulate Characterization Methods

Benson¹,

Kong²,

Azenkeng³

et al. 2007

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“…The authors also noted some positive effects of presence of surfactants in PCR mixture such as improvement with baseline drift and decrease of background noise of PCR. Usually the additive of 0.5 -2.0% w/v of nonionic surfactant Triton X-100 was used for the solubilization of such organic reagents as Dithizone derivatives [68,69], CAS [34], and 5-Br-PADAP [70] in PCR.…”

Section: Effect Of Surfactantsmentioning

confidence: 99%

Recent developments in the high‐performance chelation ion chromatography of trace metals

Nesterenko¹,

Jones

2007

J of Separation Science

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Review Recent developments in the high-performance chelation ion chromatography of trace metalsThere have been a number of significant developments in the high-performance chelation ion chromatography (HPCIC) of trace metals in recent years. This review focuses on these developments, while giving important information on the fundamental parameters controlling the chelation sorption mechanism, including type of chelating group, stability constants, kinetics, and column temperature. The discussion pays particular attention to the types and properties of efficient chelating stationary phases which have been fabricated for certain groups of metals. The review also describes a number of major improvements in postcolumn reaction detection including the use of the latest reagents and noise reduction strategies to improve sensitivity and reduce LOD. In the final section, an indication of the applicability of HPCIC to a range of complex sample types is given with some key examples and chromatograms using the latest high-efficiency chelating phases.

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“…3a and b Our previous work [9] has tested that under the 21 PDCA eluent conditions, Pb elutes first and is close to the negative peak of water, which limits the metals can be achieved using an eluent of pH 3.88. volume of a loop used in real sample analysis. The…”

mentioning

confidence: 99%

Retention behavior of transition metals on a bifunctional ion-exchange column with oxalic acid as eluent

Ding

Mou

2001

Journal of Chromatography A

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The common eluents used with a bifunctional ion-exchange column (IonPac CS5A) for separating transition metals are pyridine-2,6-dicarboxylic acid and oxalic acid (Ox). When Ox is used, cadmium and manganese co-elute. Although much 21 21 research has been done to overcome the Cd -Mn co-elution problem, the role of lithium hydroxide in separating the transition metals has received little attention. In this study, it is found that when the Ox concentration is higher than 35 mM, allows the separation of seven metals (Cu , Pb , Co , Mn , Cd , Zn and Ni ) in a single run. The effects of inorganic modifiers such as NaNO , Na SO and Na P O on retention behavior of the metals are also investigated.

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Ion chromatography of heavy and transition metals by on- and post-column derivatizations

Cited by 40 publications

References 13 publications

Advanced Fine Particulate Characterization Methods

Advanced Fine Particulate Characterization Methods

Recent developments in the high‐performance chelation ion chromatography of trace metals

Retention behavior of transition metals on a bifunctional ion-exchange column with oxalic acid as eluent

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