D – 99 Standard Test Method for Refractive Index and Refractive Dispersion of Hydrocarbon Liquids, hydrocarbons, refractive dispersion, refractive index. ASTM D(R07) – Designation: D – 02 (Reapproved ) An American National Standard. As well as adding a sample changer or special density cell for high pressures and temperatures, a DMA Generation M density meter from Anton Paar (Austria) .
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The possibility of changing the composition of the sample by action of the drying agent, by selective adsorption on the lter, or by fractional evaporation, shall be considered.
Refractive Index Measurements According to ASTM D Petro Online
Your asstm will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Measured values are given according to your official product specifications e. Reagents and Materials 7. Dec 21 Read Dust and oil can impair the optical component of the instrument. This combination of instruments is the first step to a modular measuring system called the Modulyser Unlimited Class.
Reasonable precautions should be taken to minimize these factors. Spectro Scientific acquired by Ametek Dec 14 Read Dec 17 Read Active view current version of standard Translated Standard: The instrument principle is based on the critical angle concept.
Some instruments can utilize a white light source, but often these instruments are limited in accuracy because of the light source. Discover the gold at the bottom of the barrel. Last previous edition approved in as D — For apparatus using nonmercury in glass thermometer, a platinum resistance probe, thermocouple, or equivalent temperature sensors are acceptable. Do not introduce an excessive amount because this can slow the thermal equilibration.
Typically, a plate may not allow an accuracy better than Anton Paar has launched a new intrinsically safe portable density meter solely designed for the petroleum industry — a must-have if samples are flammable o Ensure that the instrument has a solvent resistant prism seal. Benefit from extensive experience in petroleum testing technology.
Preparation of Apparatus 9. The accuracy and resolution of the temperature measuring device shall be 0. Do not dry the prism faces by rubbing with dry cotton.
NOTE 8—From experience using the instrument, the user will be able to judge with a safe margin the amount of time needed for a sample to thermally equilibrate on the prism. Liquid color should be limited to No. When a new QC sample material is required, control limits for the new material should be established before the old QC sample is exhausted.
Verification of the accuracy of such measurements astn depend upon the availability of reliable, certified reference standards that demonstrate the performance of the instrument used under the particular measuring conditions. This standard is subject to revision at any time ast the responsible technical committee and must be reviewed d121 ve years and if not revised, either reapproved or withdrawn.
NOTE 7—When determining refractive dispersion, it is expected that the instrument would have been calibrated at both wavelengths used. An upward drift means the sample is cooling on the prism; a downward drift means the sample is warming up. Do you like or dislike what you have read?
To leave comments please complete the form below. They may require a single, two-point, or multi-point calibration.
If an external bath is used, the thermostating liquid shall pass the temperature measuring device on leaving, not on entering the prism. Refractive index should, therefore, be measured using light of a single wavelength monochromatic light.
Refractive Index Measurements According to ASTM D1218
The sample shall be free of suspended solids, water, or other materials that may settle onto the prism surface and affect the measured reading. Miniature spectrometer spearheads development of a n Similarly, if the circulating liquid temperature is changed, a new calibration sequence will be required.
Vapors may cause ash re. Automatic digital refractometers may require a single zerotwo-point, or multi-point calibration. It may also be dened as the sine of the angle of incidence divided by the sine of the angle of refraction, as light passes from air into the substance.
Sep 19 Read Anton Paar has launched Dianathe ideal solution for automatically performing high-precision distillation range analysis at atmospheric pressure.
Open the prism assembly.