ASTM E246-10 Determination of Iron in Iron Ores and Related Materials
The determination of the total iron content is the primary means for establishing the commercial value of iron ores used in international trade. The standard test methods for determination of iron in iron ores and other materials are described in ASTM E246-10 standard. The values are reported in SI units.
ASTM E246-10 defines the standard test methods to estimate iron concentration in iron ores, concentrates and agglomerates. The methods are suitable for determining iron concentration between 30% to 95% iron. This standard describes three methods using dichromate titration for estimating iron content. Hydrogen sulfide reduction, stannous chloride reduction and silver reduction dichromate titration methods are the standard methods contained in ASTM E246-10.
The sample is dissolved in HCl. This results in formation of an insoluble residue which is filtered, ignited, and treated for the recovery of iron. It is then added to the main solution.
Test Method A-Iron by Hydrogen Sulfide Reduction Dichromate Titration Method
To the solution containing all the iron, H2SO4 is added and the solution is evaporated to fumes to expel chlorides. The salts are made to dissolve in water. The resultant solution is boiled, and the iron is reduced by a rapid stream of hydrogen sulfide (H2S). The precipitated sulfides are filtered and washed with an acid sulfide wash solution until free of iron. The filtrate is then boiled to expel the H2S, cooled, and titrated with K2Cr2O7 solution, using sodium diphenylamine sulfonate as the indicator.
Test Method B- Iron by Stannous Chloride Reduction Dichromate Titration Method
Most of the iron is reduced with stannous chloride, followed by the addition of a slight excess of titanium (III) chloride solution. The excess titanium (III) is then oxidized in the hot solution with HClO4. The solution is cooled and the reduced iron is titrated with a standard K2Cr2O7 solution using sodium diphenylamine sulfonate as the visual endpoint indicator.
Test Method C- Iron by Silver Reduction Dichromate Titration MethodThe test sample is passed through a silver reductor. After addition of H2SO4–H3PO4 mixture and diphenylamine sulfonate indicator, the total iron is determined by titration with a standard solution of K2Cr2O7.
Test specimen weight (g)
The percentage of iron is calculated as follows;
Test Method A
A = millilitres of K2Cr2O7 required for titration of the sample,
B = millilitres of K2Cr2O7 required for titration of the blank,
C = iron equivalent of the K2Cr2O7, g/mL, and
D = grams of sample used.
Test Method B
V1 = volume of K2Cr2O7 standard solution used for the
titration of the analytical sample, mL,
V2 = volume of K2Cr2O7 standard solution used for the
titration of the blank test, mL, and
m = mass of the test portion, g.
Test Method C
T = the volume in millilitres of K2Cr2O7 standard solution
ASTM E572 test method covers the analysis of stainless and alloy steels by Wavelength Dispersive X-ray Fluorescence Spectrometry (WDXRF). It provides rapid, multi-element determinations with sufficient accuracy to assure product quality.
The ASTM D2674 is a standard test method for the analysis of sulfochromate etches solution used in the surface preparation of aluminum. The ASTM D2674 standard specifies a method for determining the efficacy of an etchant used to prepare the surface of aluminum alloys for subsequent adhesive bonding.
An immunological method for quantization of Hevea Natural Rubber (HNRL) proteins using rabbit anti-HNRL serum. Rabbits immunized with HNRL proteins react to the majority of the proteins present, and their sera have the capability to detect most if not all the proteins in HNRL.
ASTM G65 measures the resistance of metallic materials to abrasion using the dry sand/rubber wheel apparatus. The quality, durability, and toughness of the sample are determined using this test. Metallic materials are ranked in their resistance to scratching abrasion under a controlled environment.
ASTM E2141 test methods provide accelerated aging and monitoring of the performance of time-dependent electrochromic devices (ECD) integrated in insulating glass units (IGU). This test helps to understand the relative serviceability of electrochromic glazings applied on ECD.
ASTM C724 test method is used in analyzing the quality and ease of maintenance of a ceramic decoration on architectural-type glass. This test method is useful in the acknowledgment of technical standards.
Send us a request
Process for testing
You share material and testing requirements with us
We ensure your sample pick-up in an ensured manner
We deliver test report to your inbox
Just share your testing requirements and leave the rest on us!