International bodies, including the International Maritime Organization (IMO) under MARPOL regulations, mandate strict limits on H2Scap H sub 2 cap S
While ASTM D5705 is widely used due to its simplicity and field portability, users must be aware of its operational limitations:
Understanding ASTM D5705: Standard Test Method for Measurement of Hydrogen Sulfide in the Vapor Phase Above Residual Fuel Oils Introduction to ASTM D5705
Hand-operated bellows or piston pumps draw a precise volume of headspace air through a chemical indicator tube. The length of the color change indicates the H2Scap H sub 2 cap S concentration. Technical Comparison: Liquid vs. Vapor Phase Testing ASTM D5705 (Vapor Phase) ASTM D7621 / IP 570 (Liquid Phase) What it measures H2Scap H sub 2 cap S gas released into the air space. Total dissolved H2Scap H sub 2 cap S within the fuel liquid. Unit of Measure Parts per million by volume ( Milligrams per kilogram ( Primary Use Case Assessing immediate worker exposure risks. Complying with marine fuel specifications (e.g., ISO 8217). Industrial Applications and Compliance astm d5705 pdf
. It remains undisturbed for a designated period specified in the standard to ensure the heavy oil reaches the target temperature uniformly [1]. 3. Agitation
Ideal for refineries, fuel terminals, and independent testing laboratories that need quick, field-ready results without relying on complex, stationary analytical instruments like gas chromatographs.
Before you download any , check the "REDLINE" or "Designation" date. The current designation follows the format: D5705 – 20 (meaning 2020 version) or D5705 – 22 . Vapor Phase Testing ASTM D5705 (Vapor Phase) ASTM
| Rating | Description | Action | | :--- | :--- | :--- | | 1 | No odor | Excellent | | 2 | Very slight, barely detectable | Acceptable for most food | | 3 | Slight, but noticeable | Borderline – review | | 4 | Moderate | Fail – investigate cause | | 5 | Strong | Fail – reject batch | | 6 | Extremely strong | Fail – potential health concern |
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No. D4526 covers determination of volatiles in polymers by headspace GC . While similar, D5705 is specifically for liquid resins, while D4526 is for solid polymers. Complying with marine fuel specifications (e
Major food brands (e.g., Nestlé, Unilever, PepsiCo) require their polyethylene suppliers to certify compliance with ASTM D5705. The specification often states: "Odor intensity shall not exceed 2.5 on a 1-6 scale when tested per ASTM D5705."
content in marine fuels to protect seafarers and the environment. Scope and Core Principles of the Test Method
ASTM D5705 is one of test methods for quantitatively measuring H₂S in residual fuels:
As the vapor passes through the tube, the chemical reagent inside changes color (typically from white/light blue to dark brown or black). The length of the color stain corresponds directly to a scale printed on the tube, providing the H2Scap H sub 2 cap S concentration in ppm v/v. ASTM D5705 vs. Alternative Methods