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ASTM D6423 Determination of pHe of Ethanol, Denatured Fuel Ethanol, and Fuel Eth
ASTM D6423 Determination of pHe of Ethanol, Denatured Fuel Ethanol, and Fuel Ethanol (Ed75-Ed85)11. Precision and Bias11.1 Precision - The precision of this test method as determined by statistical examination of the interlaboratory test results is as follows:11.1.1 Repeatability - The difference between ...
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ASTM D6423 Determination of pHe of Ethanol, Denatured Fuel Ethanol, and Fuel Eth
ASTM D6423 Determination of pHe of Ethanol, Denatured Fuel Ethanol, and Fuel Ethanol (Ed75-Ed85)10. Procedure10.1 Fill the electrode as needed with 3M KCl solution, which is supplied with the electrode.10.2 Standardize the assembly with two reference buffer solutions, as described in 9.3 to 9.4.10.3 ...
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ASTM D6423 Determination of pHe of Ethanol, Denatured Fuel Ethanol, and Fuel Eth
ASTM D6423 Determination of pHe of Ethanol, Denatured Fuel Ethanol, and Fuel Ethanol (Ed75-Ed85)6. Apparatus6.1 pH meter - All types of commercially available pH meters with a sufficiently high impedance and recommended for use with ion specific electrodes are acceptable for this test method. Temperature ...
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ASTM D6423 Determination of pHe of Ethanol, Denatured Fuel Ethanol, and Fuel Eth
ASTM D6423 Determination of pHe of Ethanol, Denatured Fuel Ethanol, and Fuel Ethanol (Ed75-Ed85)4. Summary of Test Method4.1 The sample is analyzed at room temperature using a specified electrode system and a pH meter with a sufficiently high impedance and recommended for use with ion specific electrodes.4.2 ...
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ASTM D6423 Determination of pHe of Ethanol, Denatured Fuel Ethanol, and Fuel Eth
ASTM D6423 Determination of pHe of Ethanol, Denatured Fuel Ethanol, and Fuel Ethanol (Ed75-Ed85)1. Scope1.1 This test method covers a procedure to determine a measure of the acid strength of high ethanol content fuels. These include ethanol, denatured fuel ethanol, and fuel ethanol (Ed75-Ed85). The test ...
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ASTM D6258 Determination of Solvent Red 164 Dye Concentration in Diesel Fuels
ASTM D6258 Determination of Solvent Red 164 Dye Concentration in Diesel Fuels11. Calculation11.1 Prepare a calibration curve, plotting the amplitude difference for each working calibration standard on the y axis versus the dye concentration on the x axis.11.2 Determine the concentration of dye in the ...
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ASTM D6258 Determination of Solvent Red 164 Dye Concentration in Diesel Fuels
ASTM D6258 Determination of Solvent Red 164 Dye Concentration in Diesel Fuels10. Procedure10.1 Using a clean 1.0 cm sample cell, scan the sample against air (empty reference sample compartment) from 450 nm to 750 nm using the same instrument settings employed for the working standards and record the ...
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ASTM D6258 Determination of Solvent Red 164 Dye Concentration in Diesel Fuels
ASTM D6258 Determination of Solvent Red 164 Dye Concentration in Diesel Fuels8. Sampling8.1 Use the principles of Practice D4057 in acquisition of test sample(s).8.2 Precautions must be taken to shield the samples from sunlight prior to analysis.NOTE 5 - Studies have shown that exposure to direct sunlight ...
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ASTM D6258 Determination of Solvent Red 164 Dye Concentration in Diesel Fuels
ASTM D6258 Determination of Solvent Red 164 Dye Concentration in Diesel Fuels6. Apparatus6.1 Spectrophotometer, equipped with automated scanning, background correction and electronic data storage capabilities, and the ability to automatically record absorbance or transmittance of solutions in the spectral ...
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ASTM D6258 Determination of Solvent Red 164 Dye Concentration in Diesel Fuels
ASTM D6258 Determination of Solvent Red 164 Dye Concentration in Diesel Fuels4. Summary of Test Method4.1 The absorbance of each sample is recorded over a specified wavelength range, and the scan is analyzed using derivative analysis software to determine the dye concentration.4.2 Derivative analysis ...
