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ASTM D2008 for Ultraviolet Absorbance and Absorptivity of Petroleum Products
ASTM D2008 for Ultraviolet Absorbance and Absorptivity of Petroleum ProductsABSORPTIVITY OF SOLIDS AND LIQUIDS12. Summary of Test Methods12.1 The range of absorptivities for petroleum products can be very wide. Probably most absorptivities of interest would fall in the range from 10(-4) to 10 L/g•cm.12.2 ...
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ASTM D2008 for Ultraviolet Absorbance and Absorptivity of Petroleum Products
ASTM D2008 for Ultraviolet Absorbance and Absorptivity of Petroleum ProductsABSORBANCE OF UNDILUTED LIQUIDS9. Procedure9.1 Fill a 1.0-cm reference cell with water. Make sure the cell windows are clean. Position the cells in the cell compartment of the spectrophotometer and obtain absorbance at the wavelengths ...
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ASTM D2008 for Ultraviolet Absorbance and Absorptivity of Petroleum Products
ASTM D2008 for Ultraviolet Absorbance and Absorptivity of Petroleum Products6. Apparatus6.1 Spectrophotometer, equipped to handle liquid samples in cells having sample path lengths up to 10 cm and capable of measuring absorbance in the spectral region from 220 to 400 nm with a spectral slit width of ...
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ASTM D2008 for Ultraviolet Absorbance and Absorptivity of Petroleum Products
ASTM D2008 for Ultraviolet Absorbance and Absorptivity of Petroleum Products4. Summary of Test Method4.1 The ultraviolet absorbance of a liquid is determined by measuring the absorption spectrum of the undiluted liquid in a cell of known path length under specified conditions.4.2 The ultraviolet absorptivity ...
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ASTM D2008 for Ultraviolet Absorbance and Absorptivity of Petroleum Products
ASTM D2008 for Ultraviolet Absorbance and Absorptivity of Petroleum Products1. Scope1.1 This test method covers the measurement of the ultraviolet absorption of a variety of petroleum products. It covers the absorbance of liquids or the absorptivity of liquids and solids, or both, at wavelengths in the ...
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ASTM D1364 for Water in Volatile Solvents(Karl Fischer Reagent Titration Method)
ASTM D1364 for Water in Volatile Solvents (Karl Fischer Reagent Titration Method)12. Report12.1 For water concentrations below 0.5 %, report all results to 0.001 %. Two determinations which agree within 0.008 %, absolute, are acceptable for averaging (95 % confidence level).13. Precision and Bias13.1 ...
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ASTM D1364 for Water in Volatile Solvents(Karl Fischer Reagent Titration Method)
ASTM D1364 for Water in Volatile Solvents (Karl Fischer Reagent Titration Method)10. Procedure10.1 Introduce 10 to 25 mL of the anhydrous solvent mixture (pyridine-glycol, 1 + 4) into the titration vessel, making sure, if an instrument end point apparatus is used, that the electrodes are covered by this ...
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ASTM D1364 for Water in Volatile Solvents(Karl Fischer Reagent Titration Method)
ASTM D1364 for Water in Volatile Solvents (Karl Fischer Reagent Titration Method)8. Sampling8.1 Hygroscopic Solvents, including for example, ketones, acetates, alcohols, and glycol ethers, absorb ambient moisture. It is essential to avoid changes in the water content of these materials during sampling ...
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ASTM D1364 for Water in Volatile Solvents(Karl Fischer Reagent Titration Method)
ASTM D1364 for Water in Volatile Solvents (Karl Fischer Reagent Titration Method)6. Apparatus6.1 Titration Vessel - For color end point titrations, use a 100 or 250-mL volumetric flask, which need not be calibrated; a 250-mL flask fitted with interchangeable electrodes (Fig. 1) may also be used for the ...
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ASTM D1364 for Water in Volatile Solvents(Karl Fischer Reagent Titration Method)
ASTM D1364 for Water in Volatile Solvents (Karl Fischer Reagent Titration Method)4. Summary of Test Method4.1 This test method is based essentially upon the reduction of iodine by sulfur dioxide in the presence of water. This reaction can be used quantitatively only when pyridine and an alcohol are present ...
