Detection of ions by replacement-ion chromatography coupled to a microwave-induced nitrogen discharge at atmospheric pressure

Galante, Leonard J.; Wilson, Daniel A.; Hieftje, Gary M.

doi:10.1016/s0003-2670(00)85270-8

Cited by 12 publications

(7 citation statements)

References 12 publications

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“…However, cation analysis with the present system was not vigorously pursued because of disappointing sensitivity. Similar difficulties were noted in prior RIC work, , where it was found that ion-exchange membranes based on perfluorosulfonic acid are highly permeable to OH – . As a consequence, significant portions of the analyte cations were lost due to penetration through the membrane.…”

Section: Resultssupporting

confidence: 72%

“…Detection limits reported earlier were estimated with a Li + background bleed of approximately 0.15 mM (1.0 μg·mL –1 ). Notably, Li + background in the present system is nearly an order of magnitude larger than in past RIC methods that used packed-bed columns or fiber suppressors for both the ion suppressor and replacement column. − Despite its higher background bleed, the present system exhibits superior performance over past RIC methods that employed photometric detection. This result indicates that multiplicative noise (or the flicker factor, k , in eq ) of the SCGD system is smaller than in prior RIC setups.…”

Section: Resultsmentioning

confidence: 82%

“…The replacement column is functionalized with a desired “replacement ion”, and separated analyte ions (or their counterions) that enter the replacement column are stoichiometrically exchanged for the replacement ions, which are then monitored downstream with a suitable detector. In its first embodiment, RIC employed Li + as the replacement ion and detection was achieved via flame photometry. , Since then, RIC was implemented with a variety of other detection methods, including ultraviolet–visible absorption spectrometry, microwave-induced nitrogen discharge emission spectrometry, and potentiometry. , …”

mentioning

confidence: 99%

“…The SCGD, described in detail elsewhere, − is particularly attractive for RIC. The SCGD is much simpler than past RIC systems based on atomic emission spectrometry, ,, as no compressed (or flammable) gases or nebulizer is required and the discharge operates in the ambient atmosphere. Additionally, because the SCGD samples directly from a flowing stream of sample solution, the detector response is very rapid, promoting chromatographic resolution.…”

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confidence: 99%

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Universal Anion Detection by Replacement-Ion Chromatography with an Atmospheric-Pressure Solution-Cathode Glow Discharge Photometric Detector

et al. 2012

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A new method of detection for ion chromatography (IC) is described that couples replacement-ion chromatography (RIC) with an atmospheric-pressure solution-cathode glow discharge (SCGD). In the new instrument, a conventional suppressed IC arrangement is followed by a "replacement column" that consists of a cation-exchange micromembrane suppressor continuously regenerated with Li(2)SO(4). In this arrangement analytes are stoichiometrically converted to Li salts when they pass through the replacement column and are introduced into the SCGD, where they are detected indirectly by atomic emission spectrometry. Though found to be unsuitable for cation determinations, the SCGD-RIC instrument shows good repeatability (<3.5% peak area relative standard deviation), approximately 4 orders of linear dynamic range, universal calibration (similar molar sensitivity for anions of the same charge), and detection limits between 0.08 and 0.64 μg·mL(-1) (25-μL injection) for several mono- and divalent anions. Deviations from the universal calibration were also observed and are critically evaluated. Optimal operating conditions are described, analytical figures of merit are presented, and background sources present in the system are characterized and explained.

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Section: Resultssupporting

confidence: 72%

Section: Resultsmentioning

confidence: 82%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Universal Anion Detection by Replacement-Ion Chromatography with an Atmospheric-Pressure Solution-Cathode Glow Discharge Photometric Detector

et al. 2012

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“…Galante et al [222] studied the use of microwave-induced plasma-AES with replacement ion chromatography (RIC) and obtained detection limits of 30-300 ng for anions and 100-500 ng for cations. They also described the design of a flame emission spectrometer for use with RIC [223].…”

Section: Atomic Emission Spectroscopymentioning

confidence: 99%

Other Modes of Detection

Parriott

1993

A Practical Guide to HPLC Detection

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Microwave‐Induced Plasma Systems in Atomic Spectroscopy

Broekaert

Engel

2000

Encyclopedia of Analytical Chemistry

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The use of microwave plasmas as radiation sources for optical atomic emission (AES), absorption (AAS) and fluorescence (AFS) spectroscopy and for laser ionization spectroscopy is treated and reference is also made to the use of microwave‐induced plasmas (MIPs) as ion sources for mass spectrometry (MS). Devices for producing both single‐electrode and electrodeless microwave plasmas are treated, in addition to methods for their diagnostics, and results for the analytically relevant plasma parameters are presented. Methods for sample introduction are discussed. They include dry aerosol generation techniques (hydride generation (HG), electrothermal evaporation, spark and laser ablation (LA)) and possibilities for the uptake of wet aerosols. Special reference is made to coupling with gas chromatography (GC) and also to the potential for coupling with high‐performance liquid chromatography (HPLC) Further, the use of microwave plasmas for cross‐excitation in the case of glow discharges (GDs) is treated. The analytical figures of merit in the case of AES with low‐power microwave plasmas, single‐electrode microwave plasmas, plasma torch sources and stabilized capacitively coupled plasmas are given also in the case of atomic absorption, fluorescence and laser ionization with these sources. The developments in MS in the case of both low‐power and high‐power microwave plasmas and in the case of various types of sample introduction are discussed. Applications of MIP atomic spectroscopy are in the fields of biological samples with special reference to microanalysis, and of environmental samples with special emphasis on metal speciation, on‐line monitoring and direct solids analysis. A critical comparison of the methodology with other methods for the determination of the elements and their species is given.

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Detection of ions by replacement-ion chromatography coupled to a microwave-induced nitrogen discharge at atmospheric pressure

Cited by 12 publications

References 12 publications

Universal Anion Detection by Replacement-Ion Chromatography with an Atmospheric-Pressure Solution-Cathode Glow Discharge Photometric Detector

Universal Anion Detection by Replacement-Ion Chromatography with an Atmospheric-Pressure Solution-Cathode Glow Discharge Photometric Detector

Other Modes of Detection

Microwave‐Induced Plasma Systems in Atomic Spectroscopy

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