The vapor space is purged with nitrogen to displace existing air. Agitation & Heating: The container is heated in an oven to 60 raised to the composed with power cap C and agitated on an orbital shaker at 220 RPM for 3 minutes Measurement: A "length of stain" detector tube (like a Draeger tube ) and a hand-operated pump are used to read the cap H sub 2 cap S concentration in the vapor phase. Limitations and Alternatives
The standard is detailed and specific. For a test to be considered compliant, the following technical parameters must be met:
gas into the headspace of a laboratory vessel, technicians must adhere to rigorous safety protocols:
The Definitive Guide to ASTM D5705: Measuring Hydrogen Sulfide in the Vapor Phase of Fuel Oils Introduction The presence of Hydrogen Sulfide ( H2Scap H sub 2 cap S
If you are interested in getting the ASTM D5705 PDF, you can visit the ASTM website ( www.astm.org ) or search for it on online libraries and databases that provide access to ASTM standards.
Read the chemical color change on the tube scale immediately to determine the concentration. Critical Factors Influencing Test Accuracy
, changing color. The length of the color stain corresponds directly to the concentration scale printed on the tube. Interpreting the Results and Precision
A calibrated bellows or piston-style hand pump designed to draw a precise volume of headspace gas through the detector tube. Step-by-Step Testing Procedure
Other reputable standard dealers (e.g., Iteh Standards ) offer the PDF download.
To legally obtain and implement this test protocol within an ISO-certified laboratory or corporate safety program, buy the current revision of the standard directly from authorized distributors.
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