ASTM D3612 PDF

Dacage People who viewed this also viewed. Acetylene—C 2 H 2. Other methods have been used to perform this analysis. Fill in your details below or click an icon to log in: The maximum using temperature in auxiliary heating areas. In this study, two changes were made to the method. Column loss can be compensated dual channel column.

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A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval. Scope 1. Other methods have been used to perform this analysis. It is the responsibility of the user of this standard to establish appro- priate safety and health practices and determine the applica- bility of regulatory limitations prior to use.

Referenced Documents 2. Current edition approved Oct. Published December Originally approved in Last previous edition approved in as D — Terminology 3. In Methods B and C, the sum of the individual gas concentra- tions corrected to torr The vessel is a headspace vial of mL nominal capacity.

Summary of Test Method 4. The evolved gases are compressed to atmo- spheric pressure and the total volume measured. The gases contained in the loop are then introduced into a gas chromato- graph. Calibra- tion curves are used in Method C to establish the concentration of each species. The composition of the sample is calculated from its chromatogram by comparing the area of the peak of each component with the area of the peak of the same component on a reference chromatogram made on a standard mixture of known composition.

The nature and amount of the individual component gases that may be recovered and analyzed may be indicative of the type and degree of the abnormality responsible for the gas generation. Apparatus 6. For Ace Glass, the glass apparatus conforming to Fig. Available from P. Box , Northwest Blvd. NOTE 2—This sample size has been found to be sufficient for most oils. However, oil that has had only limited exposure to air may contain much smaller amounts of nitrogen and oxygen.

For these oils it may be desirable to increase the size of the sample and the extraction apparatus. NOTE 3—Alternative apparatus designs including the use of a Toepler pump have also been found successful.

A suitable arrangement is shown in Fig. Warning—Mercury vapor is ex- tremely toxic. Appropriate precautions should be taken.

Sampling 7. The use of rigid metal cylinders is not recommended for use with Method B. It is also important that the quantity and composition of dissolved gases remain unchanged during transport to the laboratory. Avoid prolonged exposure to light by immediately placing drawn samples into light-proof containers and retaining them there until the start of testing. Evaluate containers for maximum storage time. Samples have been stored in syringes and metal cylinders for four weeks with no appreciable change in gas content.

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