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🔬 Scope and Significance This test method, designated D4747-02 (Reapproved 2014), specifies the procedure for determining the free monomer content of acrylic latexes using gas-liquid chromatography (GLC). The method has been successfully validated for monomers including n-butyl methacrylate, n-butyl acrylate,…
The D4745−19 (Reapproved 2024) classification system is the definitive standard for filled PTFE molding and extrusion materials. It establishes a framework for specifying compounds made from virgin PTFE resins (Types II and III per D4894) combined with fillers that withstand…
ASTM D4743‑92 (Reapproved 1996) defines a laboratory procedure for determining the efficacy of solvent systems in dissolving water‑formed deposits. The method applies a gravimetric approach to evaluate single or multiple solvent systems on removed or synthetic deposits. 📐 Scope and…
This standard (Designation: D 4744 – 89, Reapproved 1995) covers the determination of organic halides (chlorine, bromine, and iodine) in water. It is an operational definition based on carbon adsorption and microcoulometric detection. 🧪 Scope and Key Limitations The test…
📐 Test Scope and Applicability ASTM D4742‑23 defines a standardized procedure for evaluating the oxidative stability of gasoline automotive engine oils using the Thin‑Film Oxygen Uptake (TFOUT) method. This accelerated bench‑scale test provides a practical means of screening lubricants under…
🔬 Overview of Test Method D4740-24 The ASTM D4740-24 standard provides a standardized spot test for evaluating the cleanliness of residual fuel oils and the compatibility of a residual fuel oil with a blend stock. Applicable to residual fuel oils…
🔬 Test Principle and Scope ASTM D4741-21 is the standard test method for measuring the dynamic viscosity of oils at high temperature and high shear rate (HTHS) using a tapered-plug viscometer. The specific test conditions are 150 °C at 1…
ASTM D4739-23, designated under the fixed designation D4739, is a critical standard for the potentiometric determination of basic constituents in petroleum products and lubricants. Specifically, it is the required method for tracking base number loss as an oil proceeds in…
ASTM D4735-24 provides a standardized gas chromatographic (GC) method for determining trace levels of thiophene in refined benzene. It is specifically validated for thiophene concentrations from 0.80 to 1.80 mg/kg using a Flame Photometric Detector (FPD) and from 0.14 to…
📐 Scope and Applicability of D4737-21 The Standard Test Method for Calculated Cetane Index by Four Variable Equation (Designation D4737-21) provides a supplementary method for estimating the ASTM cetane number of distillate fuels. The index is derived from fuel density…