is the standard test method for determining the Residual Styrene Monomer Content in Unsaturated Polyester Resins by Gas Chromatography .
A: Due to the reactivity, absorptivity, and volatility of H₂S, any measurement method only provides an H₂S concentration at a given moment in time.
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A water or air bath capable of maintaining a constant temperature of 60°C ± 1°C.
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Legally, no. The only "free" access is if your employer has a site license or if you view a read-only copy at a subscribing library. Any website offering a direct download link without payment is likely pirated and potentially dangerous. is the standard test method for determining the
The headspace (the remaining 50% air space) is purged with nitrogen to remove existing air, ensuring the measured H2Scap H sub 2 cap S comes only from the sample.
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and agitated on an orbital shaker at to encourage H2Scap H sub 2 cap S to move into the vapor phase.
Unlike more complex, slow lab methods, ASTM D5705 is relatively fast, making it ideal for field and laboratory environments. Summary of the Test Procedure
H2S(g)+Pb(CH3COO)2(s)→PbS(s)+2CH3COOH(g)cap H sub 2 cap S open paren g close paren plus cap P b open paren cap C cap H sub 3 cap C cap O cap O close paren sub 2 open paren s close paren right arrow cap P b cap S open paren s close paren plus 2 cap C cap H sub 3 cap C cap O cap O cap H open paren g close paren
The test involves taking a sample of the residual fuel oil and allowing it to reach equilibrium in a sealed container. A sampling probe or tube is then used to draw the vapor from the headspace (the area between the liquid surface and the top of the container) and pass it through a calibrated detector tube that measures the H₂S concentration.
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