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A number in parentheses indicates the year of last reapproval.
ASTM Dpdf – Free Download PDF
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. Ten laboratories did automatic D distillation, and five laboratories did manual D distillation. Last previous edition D — In the operation of the distillation apparatus, use a suitable catch pan and shielding to contain spilled liquid in the event of accidental breakage of the distillation flask.
Place a flat cover on the top of the graduate to prevent condensed moisture from entering the graduate. The relative volatility of organic liquids can be used with other tests for identification and measurement of quality. NOTE 2—Toluene is shown in reference manuals as boiling at Specific hazard statements are given in Section 7. Any variation would result in heating a larger portion of surrounding air to a higher temperature than that of the flask. Organic liquids are used as solvents in many chemical processes.
If yields are not obtained within these limits, repeat the test.
HDA 620: Distillation Analyzer
Transfer the fresh specimen directly to the flask, allowing the receiver to drain for 15 to 20 s see Note 6. NOTE 6—For viscous liquids, a longer drainage period may be necessary to complete the transfer of the specimen to the flask, but the drainage time should not exceed 5 min. Preparation of Ashm 8. Table 6 gives a summary of the relative bias observed for the samples used in the study.
1d078 The study involved six samples of different boiling point ranges, done in duplicate. Compound 6 The sole source of supply of the Lo-Cap heater known to the committee at this time is Precision Scientific Co.
Remove the flask from the apparatus and transfer the d10788 specimen directly to the flask, allowing the graduate to drain for 15 to 20 s. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
See Section 9 for factors that cause superheating, and Appendix X1 for a discussion on the use of electric heaters. The flask is then prepared for use by washing with water, rinsing with acetone, and drying. If an agreement on which method to designate cannot be made, the referee test method will be the manual method. Other means can be employed, such as the use of a platinum-resistance thermometer or a National Bureau of Standards thermometer.
Size px x x x x Have the bottom of the flask resting firmly in the hole of the heat shield. For low-boiling materials, cool the heating unit to room temperature before starting the test.
Summary of Test Method 4. Record the temperature at this point as the dry point Section 3. Boiling temperatures observed on a partial immersion thermometer are corrected to standard atmospheric x1078 to give true boiling temperatures.
Place the receiver, without drying, at the outlet of the condenser tube in such a position that the condenser tube extends into the graduate at least 25 mm but does not extend below the mL mark.
The temperature of qstm mercury in the thermometer is equilibrated with that of the refluxing liquid before the distillate is taken over.
The hole must be perfectly circular, with no irregularities. Caution should be taken when handling mercury and mercury-containing products. 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. Specific hazard statements are given in Section 7.
For narrow-boiling hydrocarbon materials, the value of K may be assumed as 0. Thank you for interesting in our services. As the relative volatility, residual matter and recovery capability affect the efficiency of these processes, this test method is useful in manufacturing control. This may be accomplished by heating and ast a pinch of tartaric acid in the bottom of the flask. Do not allow any of the specimen to enter the vapor tube.
If a dry point is not obtained that is, if active decomposition should occur before the dry point is reached, as evidenced by a rapid evolution of vapor or heavy fumes; or if there is liquid remaining on the bottom of the flask when the maximum temperature is observed on the distillation thermometerrecord this fact.
A superscript epsilon e indicates an editorial change since the last revision or reapproval. Precision and Bias Therefore, this test method provides a test procedure for assessing compliance with a awtm.