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ASTM D1747 Standard Test Method for Refractive Index of Viscous Materials
ASTM D1747 Standard Test Method for Refractive Index of Viscous Materials13. Calculation and Reporting13.1 Correct the observed refractive index by the amount shown in the calibration curve. Report the value of refractive index as:14. Precision and Bias14.1 The precision of the test method as obtained ...
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ASTM D1747 Standard Test Method for Refractive Index of Viscous Materials
ASTM D1747 Standard Test Method for Refractive Index of Viscous Materials12. Procedure12.1 Thoroughly clean the prism faces as described in 10.2. Adjust the thermostat so that the temperature indicated by the thermocouple placed between the faces of the closed prism (loaded with oil) is within 0.2°C ...
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ASTM D1747 Standard Test Method for Refractive Index of Viscous Materials
ASTM D1747 Standard Test Method for Refractive Index of Viscous Materials10. Preparation of Apparatus10.1 The refractometer shall be kept scrupulously clean at all times. Dust and oil, if allowed to accumulate on any part of the instrument, will find its way into the moving parts, causing wear and eventual ...
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ASTM D1747 Standard Test Method for Refractive Index of Viscous Materials
ASTM D1747 Standard Test Method for Refractive Index of Viscous Materials6. Apparatus6.1 Refractometer, precision Abbé-type, having a range in refractive index from 1.30 to 1.63. Other instruments reading to at least four decimal places may be used.NOTE 2 - When other instruments are used, follow the ...
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ASTM D1747 Standard Test Method for Refractive Index of Viscous Materials
ASTM D1747 Standard Test Method for Refractive Index of Viscous Materials4. Summary of Test Method4.1 The refractive index normally is measured by the critical angle method using monochromatic light from a sodium lamp. The instrument is previously adjusted by means of calibration obtained with certified ...
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ASTM D1747 Standard Test Method for Refractive Index of Viscous Materials
ASTM D1747 Standard Test Method for Refractive Index of Viscous Materials1. Scope1.1 This test method covers the measurement of refractive indexes, accurate to two units in the fourth decimal place, of transparent and light-colored viscous hydrocarbon liquids and melted solids which have refractive indexes ...
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ASTM D3231 Standard Test Method for Phosphorus in Gasoline
ASTM D3231 Standard Test Method for Phosphorus in Gasoline11. Quality Control11.1 Confirm the performance of the instrument or the test procedure by analyzing a quality control (QC) sample (6.10).11.2 Prior to monitoring the measurement process, the user of the method needs to determine the average value ...
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ASTM D3231 Standard Test Method for Phosphorus in Gasoline
ASTM D3231 Standard Test Method for Phosphorus in Gasoline9. Procedure9.1 Clean all glassware before use with cleaning acid or by some procedure that does not involve use of commercial detergents. These compounds often contain alkali phosphates that are strongly adsorbed by glass surfaces and are not ...
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ASTM D3231 Standard Test Method for Phosphorus in Gasoline
ASTM D3231 Standard Test Method for Phosphorus in Gasoline8. Calibration8.1 Transfer by buret, or a volumetric transfer pipet, 0.0, 0.5, 1.0, 1.5, 2.0, 3.0, 3.5, and 4.0 mL of phosphorus standard solution into 100-mL volumetric flasks.8.2 Pipet 10 mL of H2SO4(1 + 10) into each flask. Mix immediately ...
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ASTM D3231 Standard Test Method for Phosphorus in Gasoline
ASTM D3231 Standard Test Method for Phosphorus in Gasoline5. Apparatus5.1 Buret, 10-mL capacity, 0.05-mL subdivisions.5.2 Constant-Temperature Bath, equipped to hold several 100-mL volumetric flasks submerged to the mark. Bath must have a large enough reservoir or heat capacity to keep the temperature ...
