Determination of bromide and potassium in saline groundwaters by capillary electrophoresis without prior dilution

Stella Rovio, Mia Mäntynen, Heli Sirén (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)

Abstract

Two capillary electrophoretic analysis methods are presented; one optimized for the analysis of Br and the other for determination of K+ in groundwaters of high conductivity. The water sampling was performed from the planned final disposal facility area for spent nuclear fuel at Olkiluoto in the municipality of Eurajoki, Finland. Bromide was analysed in an acidic electrolyte solution containing 5 mM formic acid and 42 mM NaCl (pH 3.5) and using direct UV detection (200 nm). Sample stacking was needed for the preconcentration. Potassium was analysed at pH 4.5 using imidazole-18-crown-6 ether solution. The accuracies of the Br and K+ methods were tested using laboratory-made reference sample mixtures with high salt concentration. In the Br analyses, the limits of detection and determination were 0.1 and 1 mg L−1, respectively. The developed CE analysis for K+ in saline water was repeatable (RSD% 14.5–18.0) and the detection and the determination limits were 0.5 and 2.0 mg L−1, respectively. The interlaboratory results showed that CE measurements of Br and K+ were compatible with those made with traditional solvent chemistry techniques.
Original languageEnglish
Pages (from-to)1331 - 1337
Number of pages7
JournalApplied Geochemistry
Volume19
Issue number8
DOIs
Publication statusPublished - 2004
MoE publication typeA1 Journal article-refereed

Fingerprint

Capillary electrophoresis
formic acid
bromide
Dilution
Potassium
Groundwater
electrokinesis
dilution
potassium
groundwater
Saline water
Spent fuels
Formic acid
Nuclear fuels
Bromides
Ether
Electrolytes
Ethers
reference sample
Salts

Keywords

  • bromide
  • potassium
  • groundwater
  • groundwater chemistry

Cite this

Rovio, Stella ; Mäntynen, Mia ; Sirén, Heli. / Determination of bromide and potassium in saline groundwaters by capillary electrophoresis without prior dilution. In: Applied Geochemistry. 2004 ; Vol. 19, No. 8. pp. 1331 - 1337.
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abstract = "Two capillary electrophoretic analysis methods are presented; one optimized for the analysis of Br− and the other for determination of K+ in groundwaters of high conductivity. The water sampling was performed from the planned final disposal facility area for spent nuclear fuel at Olkiluoto in the municipality of Eurajoki, Finland. Bromide was analysed in an acidic electrolyte solution containing 5 mM formic acid and 42 mM NaCl (pH 3.5) and using direct UV detection (200 nm). Sample stacking was needed for the preconcentration. Potassium was analysed at pH 4.5 using imidazole-18-crown-6 ether solution. The accuracies of the Br− and K+ methods were tested using laboratory-made reference sample mixtures with high salt concentration. In the Br− analyses, the limits of detection and determination were 0.1 and 1 mg L−1, respectively. The developed CE analysis for K+ in saline water was repeatable (RSD{\%} 14.5–18.0) and the detection and the determination limits were 0.5 and 2.0 mg L−1, respectively. The interlaboratory results showed that CE measurements of Br− and K+ were compatible with those made with traditional solvent chemistry techniques.",
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Determination of bromide and potassium in saline groundwaters by capillary electrophoresis without prior dilution. / Rovio, Stella; Mäntynen, Mia; Sirén, Heli (Corresponding Author).

In: Applied Geochemistry, Vol. 19, No. 8, 2004, p. 1331 - 1337.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Determination of bromide and potassium in saline groundwaters by capillary electrophoresis without prior dilution

AU - Rovio, Stella

AU - Mäntynen, Mia

AU - Sirén, Heli

PY - 2004

Y1 - 2004

N2 - Two capillary electrophoretic analysis methods are presented; one optimized for the analysis of Br− and the other for determination of K+ in groundwaters of high conductivity. The water sampling was performed from the planned final disposal facility area for spent nuclear fuel at Olkiluoto in the municipality of Eurajoki, Finland. Bromide was analysed in an acidic electrolyte solution containing 5 mM formic acid and 42 mM NaCl (pH 3.5) and using direct UV detection (200 nm). Sample stacking was needed for the preconcentration. Potassium was analysed at pH 4.5 using imidazole-18-crown-6 ether solution. The accuracies of the Br− and K+ methods were tested using laboratory-made reference sample mixtures with high salt concentration. In the Br− analyses, the limits of detection and determination were 0.1 and 1 mg L−1, respectively. The developed CE analysis for K+ in saline water was repeatable (RSD% 14.5–18.0) and the detection and the determination limits were 0.5 and 2.0 mg L−1, respectively. The interlaboratory results showed that CE measurements of Br− and K+ were compatible with those made with traditional solvent chemistry techniques.

AB - Two capillary electrophoretic analysis methods are presented; one optimized for the analysis of Br− and the other for determination of K+ in groundwaters of high conductivity. The water sampling was performed from the planned final disposal facility area for spent nuclear fuel at Olkiluoto in the municipality of Eurajoki, Finland. Bromide was analysed in an acidic electrolyte solution containing 5 mM formic acid and 42 mM NaCl (pH 3.5) and using direct UV detection (200 nm). Sample stacking was needed for the preconcentration. Potassium was analysed at pH 4.5 using imidazole-18-crown-6 ether solution. The accuracies of the Br− and K+ methods were tested using laboratory-made reference sample mixtures with high salt concentration. In the Br− analyses, the limits of detection and determination were 0.1 and 1 mg L−1, respectively. The developed CE analysis for K+ in saline water was repeatable (RSD% 14.5–18.0) and the detection and the determination limits were 0.5 and 2.0 mg L−1, respectively. The interlaboratory results showed that CE measurements of Br− and K+ were compatible with those made with traditional solvent chemistry techniques.

KW - bromide

KW - potassium

KW - groundwater

KW - groundwater chemistry

U2 - 10.1016/j.apgeochem.2003.12.007

DO - 10.1016/j.apgeochem.2003.12.007

M3 - Article

VL - 19

SP - 1331

EP - 1337

JO - Applied Geochemistry

JF - Applied Geochemistry

SN - 0883-2927

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