ASTM E278-01 Test Method for Determination of Phosphorus in Iron Ores by Phosphomolybdate Coprecipitation and Nitric Acid Titrimetry

ASTM E278-01 Test Method provides a measure to determine the phosphorus in iron ores by using Phosphomolybdate Coprecipi tation and Nitric Acid Titrimetry.... Read More

  • Average 30% Cost

  • 100% Confidentiality

  • Free, No-obligation

  • 100% Customer



    ASTM E278-01 Test Method covers the determination of phosphorus in iron ores, concentrates, and agglomerates. The phosphorus is measured from the range ( 0.01 % to 1.00 %).

    Test Procedure:

    In ASTM E278-01 test method, the sample is dissolved in HCl and HNO3. After the addition of HClO4, the solution is evaporated to strong fumes to dehydrate the silica. The insoluble residue is filtered off, ignited, and treated for the recovery of any contained phosphorus. Ammonium molybdate is added to precipitate phosphomolybdate. The precipitate is filtered off and washed free from acid. It is then dissolved in excess of standard sodium hydroxide solution. The excess sodium hydroxide is titrated with a standard solution of HNO3 using phenolphthalein as an indicator.

    C:\Users\priyanka\Desktop\figure 01.JPG

    Figure 1: Titration Setup (Source:

    Specimen size:

    A pulverized Iron ore sample weight ±25 mg


    Calculate the percent of phosphorus as follows:


    A = standard NaOH solution used, mL,

    B = standard HNO3 required for titration of the excess of NaOH in the test sample, mL, 

    C = standard NaOH solution equivalent to 1 mL of the standard HNO3, mL, 

    D = standard NaOH solution required for blank determination, mL,

    E = standard HNO3 required for titration of the excess NaOH in blank determination, mL, 

    F = phosphorus equivalent of the standard NaOH solution, g/mL, and

    G = weight of test sample used


    Core Materials Testing Services


    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

      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