ASTM E203 Test Method for Water Using Volumetric Karl Fischer Titration

ASTM E203 Test Method for Water Using Volumetric Karl Fischer Titration

ASTM E203 test provides a general guide to determine free water and water of hydration in most solid or liquid organic and inorganic compounds using volumetric Karl Fischer (KF) titration. KF reagent is used in the test process. The end results are reported as the percentage of water to the nearest 0.001 %.

    Scope:

    ASTM E203 test provides a general guide to determine free water and water of hydration in most liquid or solid organic and inorganic compounds using volumetric Karl Fischer (KF) titration. This test uses automatic titration for determining the KF titration end-point potentiometrically.  This test method is applicable for both pyridine and pyridine-free KF reagents to determine water using volumetric titration. ASTM E203 is useful for the estimation of water over a wide concentration range i.e., parts per million (ppm) to pure water. 

    Test Procedure:

    For ASTM E203, the sample, containing 100 mg of water, is dissolved in an appropriate liquid. Then, it is titrated with a KF reagent that consists of sulfur dioxide, organic base, iodine, and a solvent that may be methanol, ethylene glycol, or 2-methoxy ethanol. The end-point of the titration is done amperometrically using a platinum electrode. A sharp change is noticed in the cell resistance when the iodine is reduced by sulfur dioxide in the presence of water.

    Sample size:

    The samples should be used as specified by ASTM E203. 

    Data:

    Water equivalent, E, of the KF reagent, in milligrams per milliliter

    The water content of the sample, weight %

    Conclusion:

    ASTM E203 test provides a general guide to determine free water and water of hydration in most solid or liquid organic and inorganic compounds using volumetric Karl Fischer (KF) titration.

    OUR SERVICES

    Core Materials Testing Services

    Metrology

    A variety of microscopy and spectroscopy tools available for precise measurements from the nano to the meter scale.

    Metrology Testing Services POPULAR TESTS:

    TEM SIMS Profilometry

    Materials Testing

    ASTM and ISO standard and custom chemical, mechanical, thermal, corrosion tests, etc. for all materials metals, ceramic or polymers.

    Materials Testing Services POPULAR TESTS:

    Nondestructive Testing Electrical Testing Chemistry Analysis

    Product Testing

    Thousands of tests for product quality and reliability under heat, humidity, temperature shock, vibration, drop, electrostatic discharge.

    Product Testing Services POPULAR TESTS:

    Vibration Testing Humidity Testing Accelerated Aging

    Looking for Material Testing?

    We have already delivered 10000+ Material Test results to top companies

      Send us a request

        Process for testing
        •  

          STEP 01

          You share material and testing requirements with us

        •  

          STEP 02

          We ensure your sample pick-up in an ensured manner

        •  

          STEP 03

          We deliver test report to your inbox

          Let’s work together!

          Share your testing requirements with us and we will be happy to assist you.

          ddd Just share your testing requirements and leave the rest on us!
          • Free, no-obligation consultation
          • Guaranteed confidentiality
          • Quick turnaround time
          • Hassle-free process

            ddd

            Let us combine our capabilities to achieve success!!

              idea icon
              Want to connect with an expert before you leave?