-
ASTM D2549 Separation of Representative Aromatics and Nonaromatics Fractions
ASTM D2549 Separation of Representative Aromatics and Nonaromatics FractionsASTM D2549 Standard Test Method for Separation of Representative Aromatics and Nonaromatics Fractions of High-Boiling Oils by Elution Chromatography10. Precision and Bias10.1 The following criteria should be used for judging ...
-
ASTM D2549 Separation of Representative Aromatics and Nonaromatics Fractions
ASTM D2549 Separation of Representative Aromatics and Nonaromatics FractionsASTM D2549 Standard Test Method for Separation of Representative Aromatics and Nonaromatics Fractions of High-Boiling Oils by Elution Chromatography8. ProcedureNOTE 3 - The procedural details differ depending on the initial boiling ...
-
ASTM D2549 Separation of Representative Aromatics and Nonaromatics Fractions
ASTM D2549 Separation of Representative Aromatics and Nonaromatics FractionsASTM D2549 Standard Test Method for Separation of Representative Aromatics and Nonaromatics Fractions of High-Boiling Oils by Elution Chromatography6. Apparatus6.1 Chromatographic Columns, as shown in Fig. 1. Different chromatographic ...
-
ASTM D2549 Separation of Representative Aromatics and Nonaromatics Fractions
ASTM D2549 Separation of Representative Aromatics and Nonaromatics FractionsASTM D2549 Standard Test Method for Separation of Representative Aromatics and Nonaromatics Fractions of High-Boiling Oils by Elution Chromatography4. Summary of Test Method4.1 A weighed amount of sample is charged to the top ...
-
ASTM D2549 Separation of Representative Aromatics and Nonaromatics Fractions
ASTM D2549 Separation of Representative Aromatics and Nonaromatics FractionsASTM D2549 Standard Test Method for Separation of Representative Aromatics and Nonaromatics Fractions of High-Boiling Oils by Elution Chromatography1. Scope1.1 This test method covers the separation and determination of representative ...
-
ASTM E260 Standard Practice for Packed Column Gas Chromatography
ASTM E260 Standard Practice for Packed Column Gas Chromatography15. Recommended Form for Writing Gas Chromatographic Methods15.1 General - Not all of the steps outlined in this section may be needed to describe adequately a method. A number of variations in procedure format are shown in the publication, ...
-
ASTM E260 Standard Practice for Packed Column Gas Chromatography
ASTM E260 Standard Practice for Packed Column Gas Chromatography13. Methods of Qualitative Analysis13.1 Identification of compounds by gas chromatography alone cannot be absolute, and the results must be considered with care. Elution of a compound is dependent upon carrier gas flow rate, column temperature, ...
-
ASTM E260 Standard Practice for Packed Column Gas Chromatography
ASTM E260 Standard Practice for Packed Column Gas Chromatography12. Use of the Gas Chromatographic Packed Column12.1 Certain precautions and preventive maintenance are necessary to obtain the best column performance. Some of these points have been made before and will be referred to in this section. ...
-
ASTM E260 Standard Practice for Packed Column Gas Chromatography
ASTM E260 Standard Practice for Packed Column Gas Chromatography11. Evaluation of Column Performance11.1 Make a test mixture which contains a normal aliphatic hydrocarbon and the compound being analyzed, or one similar in structure. The aliphatic hydrocarbon peak should appear in the chromatogram near ...
-
ASTM E260 Standard Practice for Packed Column Gas Chromatography
ASTM E260 Standard Practice for Packed Column Gas Chromatography10. Sample Injection Procedures10.1 Injection Technique - Useful analyses are obtained only by injecting representative samples into the gas chromatograph. Since chromatographic samples are small, the best practices and procedures must be ...
