Environmental Engineering Reference
In-Depth Information
Table 7.6 Draft data sheet for recording measurements and calculations to be used in
later analyses and figures
Raw mV
Eh
Eh relative to the TS
Elect
#
Elect
#
Elect
#
Elect
#
Elect
#
Elect
#
TS
Eh
Elect
#
Elect
#
Date
pH
Elect #
A similar sheet should be used for collecting data both at 10 cm and at 25 cm
400
10A
10B
10C
10 Mean
27.5A
27.5B
27.5C
27.5 Mean
200
0
-200
-400
1/25
1/27
1/29
1/31
2/2
2/4
2/6
2/8
2/10
2/12
Date
Fig. 7.10 Plot showing how Eh values are related to the Technical Standard line of the NTCHS, as
a function of time. Positive values (above zero) indicate that the Eh is above the TS line (and thus
is oxidizing). When values drop below zero, it indicates reducing soil conditions
References
Childs CW (1981) Field test for ferrous iron and ferric-organic complexes (on exchange sites on in
water-soluble forms) in soils. Aust J Soil Res 19:175-180
Light TS (1972) Standard solution for redox potential measurements. Anal Chem 44:1038-1039
National Technical Committee for Hydric Soils (2007) Technical note 11: technical standards for
hydric
soils. USDA-NRCS, Washington, DC.
Owens PR, Wilding LP, Lee LM, Herbert BE (2005) Evaluation of platinum electrodes and three
electrode potential standards to determine electrode quality. Soil Sci Soc Am J 69:1541-1550
Rabenhorst MC (2009) Making soil oxidation-reduction potential measurements using
multimeters. Soil Sci Soc Am J 73:2198-2201
Rabenhorst MC, Hively WD, James BR (2009) Measurements of soil redox potential. Soil Sci Soc
Am J 73:668-674
Veneman PLM, Pickering EW (1983) Salt bridge for field redox potential measurements.
Commun Soil Sci Plant 14:669-677
