The standard test methods for the analysis of sulfuric acid are given by ASTM E223. Acid strength and impurity levels are important factors in many uses of sulfuric acid. The values stated in SI units are considered standard.
Average 30% Cost Savings
100% Confidentiality Guarantee
Free, No-obligation Consultation
100% Customer Satisfaction
TRUSTED BY ENGINEERS FROM
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 are important factors in many uses of sulfuric acid. The values stated in SI units are considered standard.
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.
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 test is a standard test method for the analysis of sulfochromate etch solutions 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
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.
Just share your testing requirements and leave the rest on us!
Free, no-obligation consultation
Guaranteed confidentiality
Quick turnaround time
Hassle-free process
Let us combine our capabilities to achieve success!!