ASTM E223 Analysis of Sulfuric Acid

The standard test methods for the analysis of sulfuric acid are given by ASTM E223. Acid strength and impurity levels ar e important factors in many uses of sulfuric acid. The values stated in SI units are considered standard.... Read More

  • Average 30% Cost
    Savings

  • 100% Confidentiality
    Guarantee

  • Free, No-obligation
    Consultation

  • 100% Customer
    Satisfaction

    TRUSTED BY ENGINEERS FROM

    Scope:

    ASTM E223 standard covers the test methods for the analysis of sulfuric acid. These test methods help in the classification of various grades of sulfuric acid and in the determination of various impurities. This standard includes analytical procedures for estimating total acidity, Baumé gravity, non-volatile matter, iron, sulfur dioxide, and arsenic. 

    Test procedure:

    The following procedures are described in ASTM E223:

    Total acidity determination: The sample is weighed using the dely tube or the snake tube test methods. A weighed sample of acid is diluted in water and titrated with standard sodium hydroxide solution, using phenolphthalein as the indicator.

    Baumé gravity determination: A glass hydrometer is used to determine the Baumé gravity of concentrated sulfuric acid. Baumé gravity is determined at 15.5 °C.

    Non-volatile matter determination: A weighed sample of acid is evaporated, ignited, and the residue is weighed.

    Iron content determination: The iron is reduced and determined calorimetrically with 1,10-phenanthroline (ortho-phenanthroline), which forms an orange-red complex with ferrous iron. The intensity of the color so formed is measured in a photometer calibrated with standard iron solutions.

    Sulfur dioxide content determination: The sulfur dioxide is swept out of the sample of sulfuric acid by means of a current of nitrogen gas. The evolved sulfur dioxide is absorbed in an alkaline solution, treated with an excess of iodate-iodide solution and the excess is titrated with sodium thiosulfate.

    Arsenic content determination: The arsenic is reduced to arsine gas, which is absorbed in a pyridine solution of silver diethyldithiocarbamate, forming a red-colored complex. The intensity of which is measured on a photometer.

    Video 01: Titration of sulfuric acid

    Specimen size:

    The size of the sample used in ASTM E223 testing shall be sufficient to perform all analyses without the reuse of any portion of the sample.

    Data:

    The following equations are used for the ASTM E223 test methods,

    V = corrected mL of NaOH solution required for titration of the sample, N = normality of the NaOH solution, W = grams of sample used

    R = weight of evaporating dish and residue, D = weight of the evaporating dish, W = sample used

    M = iron found from calibration curve, W = sample used

    B = Na2S2O3 solution required for the titration of the blank solution, A = Na2S2O3 solution required for the titration of the sample solution, N = normality of the Na2S2O3 solution, W = sample used

    M = arsenic found from calibration curve, W = sample used

    Conclusion:

    ASTM E223 standard covers the test methods for the analysis of sulfuric acid.

    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

          You ship your sample to us or arrange for us to pick it up.

        •  
          STEP 03

          We deliver the test report to your email.

          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!
          • Quick Turnaround and Hasslefree process
          • Confidentiality Guarantee
          • Free, No-obligation Consultation
          • 100% Customer Satisfaction

            ddd

            Let us combine our capabilities to achieve success!!

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