ASTM D7513 The Capacity of Mixed Bed Ion Exchange Cartridges

ASTM D7513 The Capacity of Mixed Bed Ion Exchange Cartridges

ASTM D7513 determines the performance of mixed bed ion exchange resin cartridges in the active form when used for deionization. The values expressed in SI units are considered as standard.

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    Scope:

    ASTM D7513 is used to determine the initial capacity of unused cartridges, evaluate unused mixed bed ion exchange cartridges for conformance to specifications, and calculate capacity on a cartridge basis. This test method is also important to test different mixed bed resin cartridges.

    Procedure:

    The ASTM D7513 test strategy is debilitating a cartridge of blended bed particle trade material to a particular endpoint with an influent arrangement of known synthesis and volume. The profluent conductivity of each volumetric augmentation equivalent to 2 Vc is measured and recorded. The process is continued until the 1.0 μS/cm value is achieved; then, at that point, the volume of the test water handled to a 1.0 μS/cm endpoint (V1) in liters is recorded.

    Video 01: Working mechanism of a mixed bed ion exchanger

    Specimen size:

    Cartridge and pressure vessel are required.

    Data:

    The following data is calculated in ASTM D7513:

    Capacity, meq/cartridge = C × VT

    Where C is the concentration of total electrolytes in the test water expressed in mill equivalents per liter and VT is the volume of test water used, per cartridge, in liters.

    Conclusion:

    ASTM D7513 is used to determine the initial capacity of unused cartridges, evaluate unused mixed bed ion exchange cartridges for conformance to specifications, and calculate capacity on a cartridge basis.

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