By rowanjenkins | Last updated 7th May 2024

ASTM D5391 Standard Test Method for Electrical Conductivity and Resistivity of a Flowing High Purity Water Sample

The electrical conductivity and resistivity of high-purity water samples below 10 µS/cm (above 0.1 Mohm-cm) can be determined using ASTM D5391. It can be used for periodic and continuous measurements, but for representative sampling to occur, the water must always flow. Water with this purity level cannot be sampled using static grab methods. Continuous measurements are done directly in pure water process lines or side stream sample lines to permit measurements on high-temperature or high-pressure samples or both.

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    Introduction to ASTM D5391

    When assessing conductivity, samples with moderate to high ionic strength are usually used since they are less likely to become contaminated during regular laboratory handling. ASTM D5391, on the other hand, takes extra care to minimize trace contamination and accounts for the high and fluctuating temperature coefficients of pure water samples, which can reach up to 7% reading per degree Celsius. MaTestLab is one of the best testing service providers, with the best network of testing laboratories in the USA to carry out ASTM D5391 tests for our clients. Furthermore, the performance of measuring instruments designed for high purity needs to be demonstrated.  ASTM D5391 can be used to find traces of ionic pollutants in water.

    ASTM D5391 Test Method

    Setting up the apparatusThe apparatus with calibration, lead wire, and flow type conductivity/resistivity cell are set up.
    Eliminating trace elementsThe original purpose of diverting the sample is to prevent impurities from building up inside the cell. If a sample line is used, the flow rate through the cell is set at 200 cc/min or according to the manufacturer’s guidelines. Additionally, several hours of rinse time are allowed if using new sample elements, a flow chamber, or a cell to ensure the full elimination of air and trace contaminants.

    ASTM D5391 Test Specimens

    Specimen DetailWater samples are used in ASTM D5391. To provide representative sampling, water must flow.
    Specimen SizeWater samples should be more than 0.1 Mohm-cm (less than 10 µS/cm).

    ASTM D5391 Test Results

    ASTM D5391 provides detailed guidelines for determining the electrical conductivity and resistivity of a high-purity water sample that is flowing. Defining exact setup, measurement, and calibration procedures ensures accuracy and consistency in resistivity and conductivity measurements.

    ASTM D5391 Related Tests

    ASTM D5391 is related to tests, including ASTM D1066 for the steam sampling protocol, ASTM D1125 for testing water conductivity and resistivity, and ASTM D1193 for reagent water specifications.

    FAQ's

    Where can I get the astm d5391 tested?

    You can share your astm d5391 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm d5391 test to various testing techniques.

    How much do I need to pay for the astm d5391 test?

    Please contact us for a detailed quote for your astm d5391 testing needs. Cost incurred to carry out different astm d5391 testing methodology depends on the type of raw material; number of samples, coupons, or specimens; test conditions, turn around time etc. Costs of some ASTM testing methods start from $100 and the final value depends upon the factors listed above. Please contact us for the best and latest prices.

    How many samples are required for astm d5391?

    The required number of samples or specimens should comply with the procedure given in the astm d5391 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.

    How much discount can I get on the astm d5391 test?

    MaTestLab has a vast testing laboratory network, hence we bring you the best testing facilities in a cost-effective way. We offer considerable discounts (15-20%) to our returning customers based on test volume and frequency.

    How many days will it take to complete the astm d5391 test?

    The turnaround time for astm d5391 test methodology depends upon the test procedure mentioned in the standard test document. However, we at MaTestLab understand your research requirements and hence try to get your test completed within the least possible time.

    Where can I get the astm d5391 tested?

    You can share your astm d5391 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm d5391 test to various testing techniques.

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