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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If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. Land Use and Asmt.
This is done simply by dividing the scale reading into the weight used for calibration Note 3. Care should be taken that the solution is physically homogeneous. 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. 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.
Raise the sample platform by means of its d13311 screw until the ring is just submerged. 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.
Contamination of the liquid surface by dust or other atmospheric impurities during measurement should be avoided. This will serve as a platform to hold the calibrating weight.
Search book title Enter keywords for book title search. Please first verify your email before subscribing to alerts. No other units of measurement are included in this standard.
ASTM D Standard Test Methods for Surface and Interfacial Tension
This is particularly true when the solute is a surface-active material. Please fill in the form below to get a quote for the Cenco Dunuoy Surface-Tension Tensiometer:. Are you sure you want to empty the cart? You can download and open this file to your own computer but DRM asm opening this file on another computer, including a networked server.
This value for the correction factor is not valid for nonaqueous liquids, and should be used only where the solvent is preponderantly water. Surface and interfacial tension Technology.
No other units of measurement are included in this standard. If it is desired to report the surface tension value of an aqueous solution at some standard temperature, for example, 25C, and the measurement was actually made at a temperature within about 3C of this value that is, 22 to 28Ca aztm factor of 0.
It can be numerically specied in terms of R, the mean radius, in d11331, of the ring; r, the radius, in centimetres, of the wire from which the ring is made; and V, the maximum volume of liquid elevated above the free surface of the liquid.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. If the recorded dial reading gamma-c is greater than the calculated value, the torsion arm should be shortened.
ASTM D1331-11 Standard Test Methods for Surface and Interfacial Tension
Two methods are covered as follows:. R1331 measurements shall be made if indicated by the over-all variation obtained, the total number of readings to be determined by the magnitude of that variation.
Work Item s – proposed revisions of this standard. Insert the platinum ring in the holder, and place a small piece of paper across the ring. Already Subscribed to this document. Repeat the calibration procedure, readjusting the zero position after each change in the length of the torsion arm, until the dial reading agrees with the calculated value.
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 d1331 tension when the temperature of the test is higher than the reported temperature.
The wire of the ring shall be in one plane, free of bends or irregularities, and circular.
ASTM D1331 – 14
Your comments will receive careful consideration at a meeting of the responsible technical committee, which d11331 may attend.
Calculation and Report 9. Last previous edition approved in as D – 89 which was withdrawn January and reinstated in June This standard is also available to be included in Standards Subscriptions.
Since the submerging of the ring 6. If the document is revised or amended, you will be notified by email.