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Saturday, July 18, 2020 | History

2 edition of Surface methods for determining the electrical conductivity of core samples found in the catalog.

Surface methods for determining the electrical conductivity of core samples

R. J. Lytle

Surface methods for determining the electrical conductivity of core samples

by R. J. Lytle

  • 81 Want to read
  • 37 Currently reading

Published by Dept. of Energy, for sale by the National Technical Information Service in [Washington], Springfield, Va .
Written in English

    Subjects:
  • Electric conductivity.

  • Edition Notes

    StatementR. J. Lytle, A. G. Duba, J. L. Willows.
    SeriesUCRL ; 52311
    ContributionsDuba, A. G., Willows, J. L., United States. Dept. of Energy., Lawrence Livermore Laboratory.
    The Physical Object
    Paginationiii, 21 p. :
    Number of Pages21
    ID Numbers
    Open LibraryOL17647876M

    Electrical conductivity millimhos per meter (mmhos/m) 1, siemens per meter (S/m) samples and core, along with a compilation and basic data pro-cessing of the geophysical logs. The succession of sediments determining the third dimension of geology that underlies the by: 1. Geophysical Methods & Applications SubSurface Surveys & Associates, Inc., established in , specializes in near-surface geophysics and utility locating services and is dedicated to establishing strong client relationships. SubSurface Survey’s extensive education and experienceFile Size: 1MB.

    A subminiature surface eddy-current transducer of the transformer type was developed, and the new methods are needed to determine the characteristics of the materials being studied in the form of measurements of the electrical conductivity of samples with dimensions from 10×10 mm to × or other LNAPLs in the subsurface. Electrical conductivity logging can be completed using direct push methods. In general, higher electrical conductivities are representative of finer grained sediments, such as silts or clays, while sands and gravels are characterized by distinctly lower electrical conductivities. Site specific core samples, eitherFile Size: KB.

    Studying the relationship between surface and volume conductivity in several "antistatic" (resistance between 10^4 to 10^8) polymer compounds. The surface conductivity seems to be pretty low. Standard Test Method for Electrical Conductivity and Resistivity of a Flowing High Purity Water Sample: D - Standard Test Method for On-Line Measurement of Low-Level Dissolved Oxygen in Water: D - Standard Test Method for pH Measurement of Water of Low Conductivity: D - .


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Surface methods for determining the electrical conductivity of core samples by R. J. Lytle Download PDF EPUB FB2

Get this from a library. Surface methods for determining the electrical conductivity of core samples. [R J Lytle; A G Duba; J L Willows; United States.

Department. Electrode configurations are described that can be used in measuring the electrical conductivity of a core sample and that do not require access to the core end faces. The use of these configurations eliminates the need for machining the core ends for placement of end by: This method is applicable to drinking, surface, and saline water, domestic and industrial wastes and acid rain (atmospheric deposition).

Summary of Method The specific conductance of a sample is measured by use of a self-contained conductivity meter, Wheatstone bridge-type, or equivalent. Samples are preferable analyzed at 25°C. Definition.

The surface conduction is the excess electric conduction tangential to a charged surface and originates from the excess counterions’ concentrations in the electrical double layer region near the solid-liquid interface. The corresponding electric conductivity is called the surface conductivity, λs, that is considered as the electric conductivity of a sheet of material of negligible.

Electrical conductivity of a sample, when used in conjunction with another method listed and compared to reference charts, can be used as a means of determining: (1) type of metal or alloy, (2) type of heat treatment (for aluminum this evaluation should be used in conjunction with a hardness examination), (3) aging of the alloy, (4) effects of corrosion, (5) heat damage, (6) temper, and (7).

The DC electrochemical methods are known to produce heat that might affect the measurements of the surface resistivity and surface conductivity of samples of high resistive oxide films such as anodised aluminium samples, metallic samples in high resistive environments, and metallic samples in inhibited solutions [1].Cited by: 6.

How to measure Electrical Conductivity 1. Aim a. To determine electrical conductivity of tap water b. To study the effect of different types of dissolved salts and their concentration on electrical conductivity of water 2. Method a. Read SAP for measurement of EC. Familiarise yourself with the operation of the EC meter available in the Size: KB.

Although the trend in conductivity was similar, the as-cast samples showed a 50% lower electrical conductivity than the homogenized NiAl-Ag alloys. Alloying with Ag in the as-cast form has shown a substantial decrease of room-temperature electrical conductivity above 5 at% due to increased solubility of Ag in the NiAl lattice.

Methods of measuring conductivity General The basic principle of conductivity measurement is the same with all methods: the instrument ge-nerates an electric voltage across the measured so lution. An electric current flows whose value de-pends on the conductivity.

Depending on the method or application, the instrument either main-File Size: 1MB. Electrical Method Electrical resistivity method is based on the difference in the electrical conductivity or the electrical resistivity of different soils.

Resistivity is defined as resistance in ohms between the opposite phases of a unit cube of a material. ρ=(𝑅𝐴 𝑙) ρ is resistivity in ohm-cm, R is resistance in ohms, A is the.

Conductivity, σ (Greek letter sigma), is the reciprocal of the resistivity. That is 1/ρ and is measured in siemens per metre (S/m). Since electrical conductivity σ = 1/ρ, the previous expression for electrical resistance, R can be rewritten as: Electrical Resistance as a Function of Conductivity.

An Efficient Method for Electrical Conductivity Measurement in the RF Range GIULIO GIOVANNETTI,1 FRANCESCA FRIJIA,2 LUCA MENICHETTI,1 VALENTINA HARTWIG,1,3 VITTORIO VITI,4 LUIGI LANDINI5 1 Institute of Clinical Physiology, National Council of Research, Pisa, Italy 2 ‘‘G.

Monasterio’’ Foundation, Pisa, Italy 3 Interdepartmental Research Center ‘‘E. Piaggio’’, University of Cited by: 5. METHODS USED IN DETERMINING THE ELECTRIC CONDUCTIVITY OF SOLUTIONS.* BY J. McCLENDON. (From the Physiological Laboratory of the University of Minnesota Medical School, Minneapolis.) (Received for publication, J ) In making a.

The conductivity (σ) of a material is defined as the reciprocal of its resistivity (ρ). Equations 3 and 4 are not usually useful for quantitative interpretation of data from surface electrical surveys but are offered here to help clarify the role of the pore spaces in controlling resistivity.

Classification of Electrical Methods. Hydrogenated NiCo2O4 double-shell hollow spheres, combining large specific surface area and high conductivity, are prepared. A specific capacitance increase of Cited by: Conductivity. Conductivity measurements are performed on massive sulfide samples using lead-sulfide electrodes.

The results are reported in Siemens/meter. The samples are prepared by cutting parallel planar faces on each sample, maximizing the distance between the faces. Saturation with water is usually not necessary. It is based on proven theory of soil electrical conductivity.

The Determining soil salinity from saturated soil-paste electrical conductivity 29 Determining soil salinity from bulk soil electrical conductivity 33 31 Four electrodes positioned in a Wenner-type surface-array and a combination electrical generator and resistance meter Surface resistivity is defined as the electrical resistance of the surface of an insulator material.

It is measured from electrode to electrode along the surface of the insulator sample. Since the surface length is fixed, the measurement is independent of the physical dimensions (i.e., thickness and diameter) of the insulator sample. Guarded File Size: KB. constant of the probe be.

For samples with a high expected conductivity, a sensor with a large cell constant should be chosen (Fig. Figure 1: Cell constant versus sample conductivity.

The figure depicts standard conductivity values for a set of samples and the range of recommended cell constants for a given conductivity probe. Size: KB. Electrical resistivity (also called specific electrical resistance or volume resistivity) and its inverse, electrical conductivity, is a fundamental property of a material that quantifies how strongly it resists or conducts electric current.A low resistivity indicates a material that readily allows electric current.

Resistivity is commonly represented by the Greek letter ρ (). Water quality - Determination of electrical conductivity 1 Scope and field of application This International Standard specifies a method for the measurement of the electrical conductivity of all types of water.

Electrical conductivity tan be used to monitor the quality of a) surface .I am using a 4-point probe method to measure the resistance of a sample of my nanofibers.

For a bulk material, I understand there is a simple equation to calculate the electrical conductivity.

Summary. The electrical conductivity of cylindrical cores of Westerly granite, Indiana limestone and Nugget, St Peter and Kayenta sandstones was measured at about 25°C in vacuo, in air, and after saturation in distilled water, tap water, and MNaCl three-electrode technique with a guard ring and the twoelectrode technique without a guard ring were by: