Lowerature Conductivity Detection for Ultrasensitive Ion Chromatography

Jiwon Eom, Dong Soo Lee

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The effects of conductivity detection temperature on calibration sensitivity and linearity in suppressed ion chromatography using hydronium or hydroxide eluent were investigated. Theoretical calibration curves for lithium and nitrate ions at 035 °C were calculated and compared with experimental data. As the detection temperature was lowered, both sensitivity and linearity of calibration at lowconcentrations were improved due to the reduced interference by water autoionization equilibrium; 4.3- and 1.3-fold increases in linear regression slopes were observed in the 01 μmol/L range when the temperature was lowered from 35 to 5 °C for lithium and nitrate, respectively, along with significant increases in the correlation coefficient. Any remaining water autoionization effect was near completely removed by using eluents contaminated with rubidiumor bromide ion at 0.1 μmol/L.

Original languageEnglish
Pages (from-to)321-329
Number of pages9
JournalBulletin of the Korean Chemical Society
Volume37
Issue number3
DOIs
Publication statusPublished - 2016 Mar 1

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Ion chromatography
Calibration
Lithium
Nitrates
Ions
Water
Bromides
Linear regression
Temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

Cite this

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abstract = "The effects of conductivity detection temperature on calibration sensitivity and linearity in suppressed ion chromatography using hydronium or hydroxide eluent were investigated. Theoretical calibration curves for lithium and nitrate ions at 035 °C were calculated and compared with experimental data. As the detection temperature was lowered, both sensitivity and linearity of calibration at lowconcentrations were improved due to the reduced interference by water autoionization equilibrium; 4.3- and 1.3-fold increases in linear regression slopes were observed in the 01 μmol/L range when the temperature was lowered from 35 to 5 °C for lithium and nitrate, respectively, along with significant increases in the correlation coefficient. Any remaining water autoionization effect was near completely removed by using eluents contaminated with rubidiumor bromide ion at 0.1 μmol/L.",
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Lowerature Conductivity Detection for Ultrasensitive Ion Chromatography. / Eom, Jiwon; Lee, Dong Soo.

In: Bulletin of the Korean Chemical Society, Vol. 37, No. 3, 01.03.2016, p. 321-329.

Research output: Contribution to journalArticle

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AB - The effects of conductivity detection temperature on calibration sensitivity and linearity in suppressed ion chromatography using hydronium or hydroxide eluent were investigated. Theoretical calibration curves for lithium and nitrate ions at 035 °C were calculated and compared with experimental data. As the detection temperature was lowered, both sensitivity and linearity of calibration at lowconcentrations were improved due to the reduced interference by water autoionization equilibrium; 4.3- and 1.3-fold increases in linear regression slopes were observed in the 01 μmol/L range when the temperature was lowered from 35 to 5 °C for lithium and nitrate, respectively, along with significant increases in the correlation coefficient. Any remaining water autoionization effect was near completely removed by using eluents contaminated with rubidiumor bromide ion at 0.1 μmol/L.

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