Soil Water Content: Microwave Oven Method

Miller, R.; Biggar, J. W.

doi:10.2136/sssaj1974.03615995003800030042x

Cited by 22 publications

(8 citation statements)

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“…All chemical methods developed require calibration curves for each specific soil, which can be difficult in field construction if little knowledge of the native soil exists. The next progression in measurement of moisture content was the simultaneous development of the nuclear soil density and moisture gauge (Visvalingam et al, 1972) and the microwave oven moisture content test (Miller et al, 1974). Once developed, microwave and nuclear moisture methods were the leading technologies due to ease of use in field applications; however, the nature of both methods imposes significant challenges to their use in expeditionary field construction.…”

Section: Problemmentioning

confidence: 99%

Device Comparison for Determining Field Soil Moisture Content

Berney¹,

Kyzar²,

Oyelami³

2011

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Section: Problemmentioning

confidence: 99%

Device Comparison for Determining Field Soil Moisture Content

Berney¹,

Kyzar²,

Oyelami³

2011

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“…The soil samples were wetted up following the procedure mentioned above. Miller et al [24], and Routledge and Sabey [25] showed that the drying time in a microwave oven increased when increasing water content and increasing sample size. Sixty two subsamples containing around 70g of soil of the different textural classes studied were dried in the microwave oven.…”

Section: Thermal Properties and Hydrodynamics Of The Soilmentioning

confidence: 99%

An Approach to Make More Technical Thermal Properties Measure in Porous Media

Rubio¹

2014

AEES

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There are three variables measured for the characterization of the thermal properties in porous media and soft rocks. These are the specific variables: heat capacity, thermal conductivity and their relationship with the thermal diffusivity. Recently, Decagon Devices has developed the KD2-Pro meter. This instrument is a useful device, which permits storing more than 4000 thermal data. This company has also improved the design of sensors for their specific use. KD2-Pro uses the infinite line heat pulse technique based on current standard ASTM D 5334. Nevertheless, it is not clear how to obtain the required reliability and accuracy in the measurements since neither the standard nor manufacturer's user manual include any method or recommendation to develop a measuring set up. Therefore, a strong methodology is required to achieve the maximum efficiency when KD2-Pro is used. This work presents ThermalHyd as the first "stadium" towards the development of a laboratory and field methodology to obtain reliability, accuracy and rapidity in the analytical dataset of thermal properties in porous media and soft rocks. To carry out the objective several soils from Llobregat river delta plain were used to obtain very acceptable results such as the wetting up samples, being the static method more accurate than dynamic one. Other results were based on the mineralogy of the samples in terms to transferring the heat pulse. Eventually, the microwave oven as a technique to obtain reliable water content dataset was a robust method, especially for its accuracy and faster performance.

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“…Other methods proposed for the determination of water in soils include the use of heat generated by propane gas instead of an electric furnace or by using a volumetric method in combination with the specific gravity of soil (6,7). More recently, the use of a microwave oven as a source of heat for the determination of water content in soils has been proposed by Miller et al (8) and modified by Hankin and Sawhney (9). All these methods are tedious, time consuming, or require a large sample size for accurate determination of water.…”

Section: Introductionmentioning

confidence: 99%

Liquid chromatographic method for determination of water in soils

Benz

Tabatabai

Fritz

1993

Communications in Soil Science and Plant Analysis

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A simple, rapid, and sensitive liquid Chromatographic (LC) method for the determination of water in soils was developed. In this method, water is extracted from soil with anhydrous methanol and injected into an LC system including a cation-exchange column in the H form. The eluent is 1.0 mM transcinnamaldehyde in acetonitrile-methanol (40:60). The detection scheme is based on the effect of water on the equilibrium established when trans-cinnamaldehyde and methanol react in the H + column to form cinnamaldehyde dimethylacetal and water. The equilibrium of the reaction is shifted towards the trans-cinnamaldehyde (absorbs strongly at the detection wavelength, 300 nm) when water is introduced into the column. The extent of the shift and the resulting change in absorbance at 300 nm are proportional to the amount of water present.Application of the method to a wide range of soils and of clay minerals containing from 0.7 to 25% water showed that the results of the LC method 1849 1850 BENZ, TAB ATABAI, AND FRITZ agreed closely with those of the gravimetric method. The LC method is accurate, precise, relatively free from interference, requires a small sample size, and gives a linear calibration graph over approximately three orders of magnitude of water concentrations. A single operator can perform approximately 80 analyses in a normal working day.

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Soil Water Content: Microwave Oven Method

Cited by 22 publications

References 0 publications

Device Comparison for Determining Field Soil Moisture Content

Device Comparison for Determining Field Soil Moisture Content

An Approach to Make More Technical Thermal Properties Measure in Porous Media

Liquid chromatographic method for determination of water in soils

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