New suppressor technology improves the ion chromatographic determination of inorganic anions and disinfection by-products in drinking water

Bose, Rakesh; Saari-Nordhaus, Raaidah; Sonaike, Adesola; Sethi, Dhanwant S

doi:10.1016/j.chroma.2004.02.016

Cited by 9 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…36 This demonstrates an improvement of the limit of detection of about two orders of magnitude in comparison to the earlier applications of CIC. 37,38 The analyzed liquid samples are combusted on a quartz boat in oxygen atmosphere in a furnace at 900-1000 C, then hydrogen fluoride is absorbed in sodium hydroxide solution and determined by ion-chromatography with conductivity detection. Prior to the CIC determination, samples of seawater were pretreated with OnGuard Dionex cartridges to remove interfering sulfate and chloride.…”

Section: Combustion Ion-chromatography For Determination Of Total Flu...mentioning

confidence: 99%

Determination of Total Organic Fluorine (TOF) in environmental samples using flow-injection and chromatographic methods

et al. 2011

View full text Add to dashboard Cite

Since the perfluorinated organic compounds have been recognized as persistent organic pollutants present in the environment, food and living organisms, new analytical methods are being developed for their determination. Many of the described earlier methods focus on determination of particular fluorinated compounds, however, the specific compounds are only a part of all organic fluorine compounds present in environmental or biological samples.

show abstract

Section: Combustion Ion-chromatography For Determination Of Total Flu...mentioning

confidence: 99%

Determination of Total Organic Fluorine (TOF) in environmental samples using flow-injection and chromatographic methods

et al. 2011

View full text Add to dashboard Cite

show abstract

“…Suppression of carbonate–bicarbonate eluents results in weakly conducting carbonic acid. Increased noise from a carbonate-based eluent, compared to a hydroxide eluent (suppression product is water) has recently been ameliorated by a two-stage suppressor design. , Even before this development, it was possible to remove the volatile carbonic acid by membrane-based devices. − A bicarbonate–carbonate gradient was traditionally held as not practical because whereas monovalent HCO 3 – occupies one anion exchange site, a CO 3 2– ion occupies two and introduction of the latter into the column thus results in the expulsion of an equimolar amount of bicarbonate resulting in a gradient “hump” . A CO 2 removal device would largely remove such a gradient hump.…”

mentioning

confidence: 99%

Automated Programmable Preparation of Carbonate-Bicarbonate Eluents for Ion Chromatography with Pressurized Carbon Dioxide

2017

View full text Add to dashboard Cite

We introduce a novel carbonate-bicarbonate eluent generation system in which CO is introduced using programmable CO pressures across a membrane into a flowing solution of electrodialytically generated high purity KOH. Many different gradient types are possible, including situations where gradients are run both on the [KOH] and the CO pressure. The system is more versatile than current electrodialytic carbonate eluent generators and can easily generate significantly higher eluent concentrations (at least to 40 mM carbonate), paving the way for future higher capacity columns. Demonstrably purer carbonate-bicarbonate eluent systems are possible compared to manually prepared carbonate-bicarbonate eluents and with considerable savings in time. Performance in different modes is examined. The dissolved CO is removed by a carbon dioxide removal device prior to detection. Best case noise levels are within a factor of 2-3 of best case suppressed hydroxide eluent operation. The eluent system allows particular latitude in controlling elution order/time of polyprotic acid analytes. Although CO introduction is possible prior to hydroxide eluent generation, this configuration causes complications because of electroreduction of CO to formate.

show abstract

“…Ion chromatography (IC) is a well-established analytical method for the determination of ionic species in solution, with detection limits down to picograms per gram. − When IC is used to perform quantitative determinations, measurement uncertainties are typically greater than 1% relative and may be higher than several percent, even when the ions of interest are present at greater than trace levels. The National Institute of Standards and Technology (NIST) is developing methodologies that can be used to improve the measurement uncertainties associated with IC analysis.…”

mentioning

confidence: 99%

Achieving 0.2% Relative Expanded Uncertainty in Ion Chromatography Analysis Using a High-Performance Methodology

Brennan

Butler

2011

Anal. Chem.

View full text Add to dashboard Cite

A high-performance (HP) technique that was originally developed for inductively coupled plasma optical emission spectrometry (ICP-OES) has been successfully translated to ion chromatography (IC) to enable analyses with extremely low uncertainty. As an example application of the HP-IC methodology, analyses of several National Institute of Standards and Technology (NIST) Standard Reference Materials (SRMs) in the SRM 3180 series of anion standard solutions are reported. The relative expanded uncertainty values expressed at 95% confidence for these analyses range from 0.087% to 0.27% and average 0.18%. Strong correlation between analyte and internal standard anion peak heights or peak areas, as well as the use of a unique drift-correction approach, is shown to be important for attaining such low uncertainty.

show abstract

New suppressor technology improves the ion chromatographic determination of inorganic anions and disinfection by-products in drinking water

Cited by 9 publications

References 5 publications

Determination of Total Organic Fluorine (TOF) in environmental samples using flow-injection and chromatographic methods

Determination of Total Organic Fluorine (TOF) in environmental samples using flow-injection and chromatographic methods

Automated Programmable Preparation of Carbonate-Bicarbonate Eluents for Ion Chromatography with Pressurized Carbon Dioxide

Achieving 0.2% Relative Expanded Uncertainty in Ion Chromatography Analysis Using a High-Performance Methodology

Contact Info

Product

Resources

About