FIA of fog- and rain-water acidity

Hiroshi Suzaki, Hiroshi Okochi, Manabu Igawa

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Both pH 4.8 and 8.3 acidities were determined by FIA. The carrier solution was a carbonate-free 1X10-3 mol/l sodium hydroxide solution. For the pH 8.3 acidity measurement, the indicator was Bromothymol Blue; for pH 4.8, however, Bromophenol Blue was used. The half-width of the signal peak was used for the calibration. The values obtained by the FIA method agree with those obtained by the corresponding titration method, except for one case, in which the carrier sodium hydroxide concentration was much lower than those of the solutes in the sample solution. For all fog- and rainwater samples, both the pH 8.3 acidity obtained by FIA and the total acidity obtained by Gran's plots in the titration method were much larger than the hydrogen-ion concentrations because of the presence not only of ammonium ions, but also organic acids.

Original languageEnglish
Pages (from-to)631-636
Number of pages6
JournalBunseki Kagaku
Volume42
Issue number10
DOIs
Publication statusPublished - 1993
Externally publishedYes

Fingerprint

Fog
Acidity
Rain
Sodium Hydroxide
Water
Titration
Bromthymol Blue
Bromphenol Blue
pH
Organic acids
Carbonates
Ammonium Compounds
Calibration
Ions

Keywords

  • acid fog
  • acid rain
  • acidity
  • FIA

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

FIA of fog- and rain-water acidity. / Suzaki, Hiroshi; Okochi, Hiroshi; Igawa, Manabu.

In: Bunseki Kagaku, Vol. 42, No. 10, 1993, p. 631-636.

Research output: Contribution to journalArticle

Suzaki, Hiroshi ; Okochi, Hiroshi ; Igawa, Manabu. / FIA of fog- and rain-water acidity. In: Bunseki Kagaku. 1993 ; Vol. 42, No. 10. pp. 631-636.
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