Concerning the Measurement of
            <i>p</i>
            H, Ion Activities, and Membrane Potentials in Colloidal Systems

Jenny, Hans; Nielsen, T. R.; Coleman, N. T.; Williams, D. E.

doi:10.1126/science.112.2902.164

Cited by 108 publications

(22 citation statements)

References 2 publications

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“…(3) There is no consensus on the theoretical explanation of the suspension effect (Jenny et al 1950;Garrels and Christ 1965;Brezinski 1983;Yang et al 1989). However, this phenomenon has been suggested to cause a pH offset of 0.1 to 0.2 units when the electrodes are introduced into soil-water systems, or several pH units if the electrodes are introduced into H+-form cation-exchange resins.…”

Section: Suspension Efectmentioning

confidence: 99%

The development of pH and pCO2 microelectrodes for studying the carbonate chemistry of pore waters near the sediment‐water interface

Cai

Reimers

1993

Limnology & Oceanography

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We made stable and rapid-responding pH and pC0, microelectrodes.The pH microelectrode has a -100~pm-diameter half-sphere bulb tip of pH glass, and the pC0, sensor has a 200-300~pm-diameter silicone-membrane covered tip. Because the pH microelectrodes have electrical resistances that arc > 1Oro ohms, all clcctrical connections arc kept scrupulously clean and dry to prevent current leakage during in situ measurements. Suspension effects arc negligible when measuring pH in marine sediments.To demonstrate the performance of the pH and pC0, microelectrodes, WC report in situ microprofiles of pH and pC0, and contiguous profiles of 0, and the formation factor from coastal sediment in San Diego Bay, California. A sharp pH decrease from 7.90 to 7.15 (seawater scale) and a pC0, increase from 578 to 3,000 patm in the top 1 cm of scdimcnt arc interpreted to be primarily the result of HS , Fe2 I , and Mn2 + oxidation by 0, rather than metabolic CO, production. The 02, pH, and pC0, profiles also reveal that there was photosynthetic activity in the top 2 mm of sediment which caused an 0, maximum and a total dissolved inorganic carbon minimum.

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Section: Suspension Efectmentioning

confidence: 99%

The development of pH and pCO2 microelectrodes for studying the carbonate chemistry of pore waters near the sediment‐water interface

Cai

Reimers

1993

Limnology & Oceanography

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“…However, large errors are sometimes incurred in pH m easurements of suspensions [26], and it seems best to rule out this uncertainty by r emoval of the solid phase.…”

Section: A Standard Solution Of Calcium Hyd Roxidementioning

confidence: 99%

Calcium hydroxide as a highly alkaline pH standard

Bates¹,

Bower²,

Smith³

1956

J. RES. NATL. BUR. STAN.

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“…The suspension effect refers to the difference in pH observed between a suspension and its supernatant (Jenny et al , 1950;Bates, 1964). This effect implies that accurate [H + ] determination is not possible in a suspension.…”

Section: Assessing the Influence Of The Suspension Effectmentioning

confidence: 99%

Determination of Diffuse Double Layer protonation constants for hydrous ferric oxide (HFO): supporting evidence for the Dzombak and Morel compilation

Pretorius

Linder

1998

Chemical Speciation & Bioavailability

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Concerning the Measurement of p H, Ion Activities, and Membrane Potentials in Colloidal Systems

Cited by 108 publications

References 2 publications

The development of pH and pCO2 microelectrodes for studying the carbonate chemistry of pore waters near the sediment‐water interface

The development of pH and pCO2 microelectrodes for studying the carbonate chemistry of pore waters near the sediment‐water interface

Calcium hydroxide as a highly alkaline pH standard

Determination of Diffuse Double Layer protonation constants for hydrous ferric oxide (HFO): supporting evidence for the Dzombak and Morel compilation

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