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- ASTM D2269 Test Method for Evaluation of White Mineral Oils by Ultraviolet Absor ASTM D2269 Test Method for Evaluation of White Mineral Oils by Ultraviolet Absorption8. Procedure8.1 Transfer 25 mL of the mineral oil and 25 mL of hexane to a separatory funnel and mix. Add 5.0 mL of dimethyl sulfoxide and shake the mixture vigorously for at least 1 min. Allow to stand until the lower ...
- ASTM D2269 Test Method for Evaluation of White Mineral Oils by Ultraviolet Absor ASTM D2269 Test Method for Evaluation of White Mineral Oils by Ultraviolet Absorption6. Apparatus6.1 Spectrophotometer, equipped to handle liquid samples in 1-cm path length cells. The instrument shall be capable of measuring absorbance with a repeatability of +/-1.0 % or better from an average at the ...
- ASTM D2269 Test Method for Evaluation of White Mineral Oils by Ultraviolet Absor ASTM D2269 Test Method for Evaluation of White Mineral Oils by Ultraviolet Absorption4. Summary of Test Method4.1 A sample of oil is extracted with dimethyl sulfoxide and the ultraviolet absorbance of the extract is determined in the range from 260 to 350 nm. The absorbance is compared with that of a ...
- ASTM D2269 Test Method for Evaluation of White Mineral Oils by Ultraviolet Absor ASTM D2269 Test Method for Evaluation of White Mineral Oils by Ultraviolet Absorption1. Scope1.1 This test method describes a procedure for the examination and evaluation of NF and USP grade white mineral oils.1.2 This test method is not applicable to oils containing additives soluble in dimethyl sulfoxide ...
- ASTM D2268 Test Method for Analysis of High-Purity n-Heptane and Isooctane by Ca ASTM D2268 Test Method for Analysis of High-Purity n-Heptane and Isooctane by Capillary Gas Chromatography10. Precision and Bias10.1 The precision of this test method as determined by statistical examination of interlaboratory results is as follows:10.1.1 Repeatability - The difference between successive ...
- ASTM D2268 Test Method for Analysis of High-Purity n-Heptane and Isooctane by Ca ASTM D2268 Test Method for Analysis of High-Purity n-Heptane and Isooctane by Capillary Gas Chromatography8. Procedure8.1 Adjust the operating variables to optimum conditions. Temperatures should be as follows: Injection port and splitter 150 to 250°C, column at optimum temperature and detector greater ...
- ASTM D2268 Test Method for Analysis of High-Purity n-Heptane and Isooctane by Ca ASTM D2268 Test Method for Analysis of High-Purity n-Heptane and Isooctane by Capillary Gas Chromatography6. Preparation of Resolving ColumnNOTE 5 - There are many different procedures for coating capillary columns. A suitable procedure is given in 6.1 through 6.3. Other columns may be used provided ...
- ASTM D2268 Test Method for Analysis of High-Purity n-Heptane and Isooctane by Ca ASTM D2268 Test Method for Analysis of High-Purity n-Heptane and Isooctane by Capillary Gas Chromatography4. Apparatus4.1 Chromatograph - Gas chromatograph should be equipped with a split-stream inlet device for introducing minute quantities of sample without fractionation, a capillary column, and a ...
- ASTM D2268 Test Method for Analysis of High-Purity n-Heptane and Isooctane by Ca ASTM D2268 Test Method for Analysis of High-Purity n-Heptane and Isooctane by Capillary Gas Chromatography2. Summary of Test Method2.1 The sample is injected into a capillary gas chromatographic column consisting of at least 61 m (200 ft) of stainless steel tubing (0.25-mm (0.010-in.) inside diameter), ...
- ASTM D2268 Test Method for Analysis of High-Purity n-Heptane and Isooctane by Ca ASTM D2268 Test Method for Analysis of High-Purity n-Heptane and Isooctane by Capillary Gas Chromatography1. Scope1.1 This test method provides for the analysis of high-purity (greater than 99.5 % by volume) n-heptane and isooctane (2,2,4-trimethylpentane), which are used as primary reference standards ...