A critical data analysis and interpretation of the pH, ion loadings and electrical conductivity of rainwater from the territory of Hong Kong

Sequeira, Ronald; Lung, F.

doi:10.1016/1352-2310(95)00161-q

Cited by 34 publications

(17 citation statements)

References 2 publications

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“…The pH and conductivity of the unfiltered precipitation were also measured immediately with a pH and conductivity meters (Fisher Scientific) [40]. The pH meter was calibrated before each measurement using standard 4.00 and 7.01 buffer solutions.…”

Section: Sample Analysismentioning

confidence: 99%

Chemical Composition of Water Soluble Inorganic Species in Precipitation at Shihwa Basin, Korea

et al. 2015

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Section: Sample Analysismentioning

confidence: 99%

Chemical Composition of Water Soluble Inorganic Species in Precipitation at Shihwa Basin, Korea

et al. 2015

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“…From the measurement of ionic strengths of precipitation, the mean ionic strength was 0.15 ± 0.16 mM and 0.23 ± 0.23 mM at the two sites, respectively, showing that 53% of the 1100 Site precipitation and 28% of that of Jeju city were below 10 −4 M, which is considered a criterion of pure rainwater. 23 The were at their highest levels in winter due to the oceanic influences by strong and prevailing northwest winds in the winter season. The concentrations of major precipitation components were compared with other domestic areas and foreign countries, as shown in − and Mg 2+ components in Jeju city showed higher concentrations compared with other landward areas, indicating relatively high oceanic influence, although that is not the case at the 1100 Site.…”

Section: Resultsmentioning

confidence: 99%

“…22 The correlation coefficient (r) shows good linearity with the value of 0.979 and 0.983 at the 1100 Site and Jeju city, respectively. 23 Also the confidence of analytical data can be evaluated indirectly comparing the calculated conductivity with the experimentally measured conductivity. From the correlation comparison between the calculated and measured conductivities of our analytical data, the correlation coefficient was 0.991 and 0.989 at the 1100 Site and Jeju city, respectively, in good linear relationship.…”

Section: Resultsmentioning

confidence: 99%

Chemical Composition Characteristics of Precipitation at Two Sites in Jeju Island

Kang¹,

Kim²,

Lee³

2003

Bulletin of the Korean Chemical Society

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The major ionic components of precipitation collected at the 1100 Site of Mt. Halla and Jeju city have been determined. The reliability of the analytical data was verified by the comparison of ion balances, electric conductivities and acid fractions; all of their correlation coefficients were above 0.94. Ionic strengths lower than 10 −4 M were found in 53% of the 1100 Site samples and 28% of the Jeju city samples. and NO 3 − in the Jeju area, and the organic acids have contributed only about 7% to the acidity. The neutralization factors by NH 3 were 0.47 and 0.48, and that of CaCO 3 was 0.31 and 0.25 at the 1100 Site and Jeju city, respectively. Investigation into major influencing sources on precipitation components by factor analysis showed that the precipitation at the 1100 Site had been influenced mostly by an anthropogenic source, followed by soil and seawater sources. The precipitation at Jeju city was mainly influenced by oceanic sources, followed by anthropogenic and soil sources.

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“…In the case of rainwater, the typical ionic strength is in the range of 0.02-3 mmol L À1 [41]. We tested the effect of ionic strength on FZ retention on Sep-Pak.…”

Section: Adaptation Of King's Protocol To Atmospheric Watersmentioning

confidence: 99%

In situspeciation of trace Fe(II) and Fe(III) in atmospheric waters by the FZ method coupled to GFAAS analysis

Journet¹,

Desboeufs²,

Sofikitis³

et al. 2007

International Journal of Environmental Analytical Chemistry

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A quasi-on-line method of measurement of the oxidation states of iron coupled with a GFAAS analysis is reported for the trace conditions found in atmospheric waters. This technique is based on the formation of a specific complex [Fe(FZ) 3 ] 4À between Fe(II) and ferrozine (FZ). tC 18 solid-phase extraction cartridges (Sep-Pak) are used to separate the [Fe(FZ) 3 ] 4À and Fe(III) so as to limit the risk of redox evolution of the sample. The adaptation to dilute aqueous media, via acidification at pH ¼ 2 of rainwater sample, and atmospheric interferences are discussed, and the Fe(II) recovery in rainwaters is determined. This method coupled with a quasi-on-line sampling protocol has been tested on rains collected in Guadeloupe Island (Caribbean Sea, 16 N, 61 W) during a field campaign in May 2005. Our results show that the proposed method can satisfactorily be applied to the determination of Fe(II) and Fe(III) in atmospheric waters under in situ conditions.

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A critical data analysis and interpretation of the pH, ion loadings and electrical conductivity of rainwater from the territory of Hong Kong

Cited by 34 publications

References 2 publications

Chemical Composition of Water Soluble Inorganic Species in Precipitation at Shihwa Basin, Korea

Chemical Composition of Water Soluble Inorganic Species in Precipitation at Shihwa Basin, Korea

Chemical Composition Characteristics of Precipitation at Two Sites in Jeju Island

In situspeciation of trace Fe(II) and Fe(III) in atmospheric waters by the FZ method coupled to GFAAS analysis

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