Find the most up-to-date version of ASTM D at Engineering ASTM D; ASTM D; ASTM D; ASTM C () .. ASTM D; ASTM D; ISO ; OECD ; EN ; EN. ASTM D – Standard Test Methods for Surface and Interfacial Tension of Solutions of Surface-Active Agents. This standard is a part of ASTM Book of.
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This value, called the uncorrected surface tension, must be multiplied by a correcting factor, F, to give the corrected surface tension. A liquid level of the type employed on analytical balances may be used.
Cenco Dunuoy 70545000 Surface-Tension Tensiometer
This instrument has, however, in addition to the torsion arm, a torsion-arm counterbalance. Values of F in5.
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ASTM D1331-11 Standard Test Methods for Surface and Interfacial Tension
We have no document history for this standard. Looking for a specific close-up? The wire of the ring shall be in one plane, free of bends or irregularities, and circular.
Subtract this correction factor from the surface tension when the temperature of the test is lower than the reported temperature, and add it to the surface tension when the temperature of the test is higher than the reported temperature.
This is particularly true when the solute is a surface-active material. More than one solute component may be present, including solute components that are not in themselves surface-active. F is a function of the contours of the liquid surface in the neighborhood of the ring at the instant of breakaway. Since the submerging of the ring 6. Also report the temperature at which the determination was made. Material Safety Data Sheets are available for reagents and materials.
Report and adequately specify the nature of the nonaqueous liquid oil used in the determination.
The precision tensiometer shall be calibrated in accordance with the following: Method C—Surface Tension by Wilhelmy plate. Lab Equipment for Sale: We have no amendments or corrections for d131 standard.
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Cenco Dunuoy Surface-Tension Tensiometer. Raise the sample platform by means of its adjusting screw until the xstm is just submerged. Need more than one copy? A number in parentheses indicates the year of last reapproval.
Historical Version s – view previous versions of standard. Calculation and Report 9. Are you sure you want to empty the cart?
ASTM D Standard Test Methods for Surface and Interfacial Tension
For liquids of low surface tension, such as surfaceactive agents, F is, in general, appreciably less than unity. Enter product namemake or model. NOTE 6Since the interfacial energy of a newly formed liquid-liquid interface generally requires some time to reach its equilibrium value, it is advisable to wait at least 5 min after the interface is formed before taking a measurement. With liquids heavier than water, where the ring must be pushed downward, the interfacial tensiometer should be used.
Four methods are covered as follows:. Allow the ring to dry, and then heat to white heat in the oxidizing portion of a gas ame. Calibration consists essentially in adjusting the length of the torsion arm so that the dial scale will read directly in dynes per centimetre. This will serve as a platform to hold the calibrating weight. Pharmaceutical laboratory apparatus stability chambers, tablet disintegration, tablet dissolution, tablet hardness, V-blenders, It must, therefore, be ascertained and applied.
Standards Subsctiption may be the perfect solution. Record the dial reading when the ring detaches from the surface. Copyright Compu-tecture, Inc.