MaTestLab > Test Standards > ASTM E224 Standard Test Methods for Analysis of Hydrochloric Acid
Last updated 10th March 2025
ASTM E224 Standard Test Methods for Analysis of Hydrochloric Acid
ASTM E224 determines the total acidity of hydrochloric acid within a specified concentration range, providing valuable insights into its chemical composition and quality. It also classifies acid grades and detects impurities, vital for its effectiveness in industries like chemicals, pharmaceuticals, and metal processing. By following ASTM E224, analysts determine total acidity accurately, ensuring the integrity of hydrochloric acid used across industries.
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ASTM E224 Introduction
ASTM E224 test methods are designed to analyze hydrochloric acid, offering guidelines for classifying grades and detecting impurities. The acid’s strength and the presence of impurities are crucial considerations in its various applications. Specifically, ASTM E224 outlines the process for determining the total acidity of hydrochloric acid, ranging from 27% to 37% mass (m/m).
ASTM E224 Test Method
Total acidity determination
A weighed portion of the acid is diluted with water and titrated using a standardized solution of 0.5 meq/mL (N) sodium hydroxide, with phenolphthalein as the indicator.
Baumé gravity determination
The hydrochloric acid sample is poured into a hydrometer cylinder. Once the temperature stabilizes, the Baumé gravity is measured using a glass hydrometer. This measurement helps classify different grades of hydrochloric acid.
Sulfated ash content determination
With added sulfuric acid, a measured amount of acid is evaporated and then heated until all the liquid evaporates. The remaining solid residue is then weighed.
Iron content determination
Iron is detected by a chemical reaction that produces a colored complex. The intensity of this color is measured with a calibrated instrument.
Color determination
A color scale is used based on the color of the acid by adding known ferric iron amounts to it.
Total sulfur content determination
The acid is mixed with bromine to convert sulfur compounds to sulfate. The sulfate is then precipitated and measured as barium sulfate.
E224 Equipment and Sample Preparation
Specimen Details
ASTM E224 classifies different grades of hydrochloric acid and determines various impurities.
Specimen Size
The sample size for ASTM E224 testing must be large enough to conduct all analyses without reusing any part of the sample.
E224 Test Results and Interpretation
The ASTM E224 standard method outlines procedures for analyzing hydrochloric acid. It helps to analyze its properties before it is applied in various testing procedures. The total acidity of HCl is accurately determined using ASTM E224.
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Tests related to ASTM E224
ASTM E224 is related to tests, including ASTM D1193 for reagent water specifications, ASTM D1209 for determining the color of clear liquids, and ASTM E1 for liquid in glass thermometer specifications.
Use of E224 in Various Industries
It is widely used as an industrial standard in chemical manufacture, pharmaceuticals, and industrial cleaning for accurate measurements of hydrochloric acid. Its application is extremely important for quality control when producing goods that involve hydrochloric acid in its process and also for ensuring that acid concentration is appropriately validated in the food and beverage industry.
Materials Commonly Tested with E224
The standard is applied for the analysis of hydrochloric acid solutions of different grades, assessment of byproducts and process streams, and testing of mixed acids, aqueous solutions, and products that require acid purity certification, including pharmaceutical or laboratory-grade reagents.
Common Challenges and Troubleshooting in E224 Testing
Sample contamination, inaccurate techniques of titration, calibration errors of equipment are facing challenges in testing. To overcome it, use standardized reagents, precise tools, correct handling, and automate processes of titration for accuracy.
Safety and Best Practices in E224 Testing
Testing requires strict safety protocols, such as wearing protective gear, carrying out the test in a well-ventilated fume hood, cleaning the glassware, calibrating instruments, and maintaining detailed logs of reagents and procedures.
Importance of E224
This standard is an important standard concerning quality, safety, and reliability for hydrochloric acid in industries and laboratories. It presents a precise method for analysis of acid concentration to avoid defects and ensure safe handling.
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Where can I get the astm e224 tested?
You can share your astm e224 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm e224 test to various testing techniques.
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Please contact us for a detailed quote for your astm e224 testing needs. Cost incurred to carry out different astm e224 testing methodology depends on the type of raw material; number of samples, coupons, or specimens; test conditions, turn around time etc. Costs of some ASTM testing methods start from $100 and the final value depends upon the factors listed above. Please contact us for the best and latest prices.
How many samples are required for astm e224?
The required number of samples or specimens should comply with the procedure given in the astm e224 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.
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MaTestLab has a vast testing laboratory network, hence we bring you the best testing facilities in a cost-effective way. We offer considerable discounts (15-20%) to our returning customers based on test volume and frequency.
How many days will it take to complete the astm e224 test?
The turnaround time for astm e224 test methodology depends upon the test procedure mentioned in the standard test document. However, we at MaTestLab understand your research requirements and hence try to get your test completed within the least possible time.
Where can I get the astm e224 tested?
You can share your astm e224 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm e224 test to various testing techniques.
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