ASTM D1218 PDF

ASTM D1218 PDF

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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Any out of control data should trigger an investigation of root cause s. Automatic digital refractometers may require a single zerotwo-point, or multi-point calibration.

In circumstances where the instrument is used continuously and in a constant thermal condition, the need for recalibration should be minimal. Dec zstm Read Dec 17 Read Dec 27 Read Safe and reliable pressure calibration and pressure They may require a single, two-point, or multi-point calibration.

Trending Articles Risks and side effects The underestimated dang New FM approved liquid analyser system is safe for h NOTE 6—The constancy of the prism temperature can be seriously affected by variations in ambient conditions such as air drafts or changes in room temperature. Different substances have varying degrees of refractive dispersion sometimes called dispersive power. Current edition approved Nov. Dust and oil can impair the optical component of the instrument.

Reasonable precautions should be taken to minimize these factors. This is why instrument manufacturers may specify the instrument accuracy as typically or better than in order to cover a broad application scope. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Characterisation of Hydrocarbons in Shale R Analytical Instrumentation 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 NOTE 7—When determining refractive dispersion, it is expected that the instrument would have been calibrated at both wavelengths used.

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The accuracy and resolution of the temperature measuring device shall be 0. Lower the sample presser if tted. Summary of Test Method 4. Filters can be used to eliminate unwanted lines borderlines.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn.

Apply a drop of 1-bromonaphthalene contact liquid, about 1. Anton Paar has launched Dianathe ideal solution for automatically performing high-precision distillation range analysis at atmospheric pressure.

Refractive Index Measurements According to ASTM D Petro Online

Density and refractive index are then determined at the d2118 time from the same sample which saves asttm and provides reliable results when analysing aviation fuels or similar finished products. Originally approved in Experience will demonstrate that this may be typically up to an hour.

Last previous edition approved in as D — The tester contains all required components ac The QC testing frequency should be increased if a large number of samples are routinely analyzed. Precision and Bias There is a variety of refractometers that have been found to be suitable for this measurement. A wide range of sample filling units and measuring modules can be added at a later date, making the Modulyser Unlimited class fit for future requirements.

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Analytical Instrumentation Anton Paar has launched Dianathe ideal solution for automatically performing high-precision distillation range analysis at atmospheric pressure. However, it is best practice to select uids with a refractive index close to the intended measuring range or, where a pair or group of standards is needed, select liquids that adequately span the working range.

Calculation and Report This is because the micro-roughness of sapphire is greater than that of softer optically atter glasses used in optical Abbe refractometers.

Refractive Index Measurements According to ASTM D1218

Do not dry the prism faces by rubbing with dry cotton. Is Fracking the Way Forward? Ensure the prism temperature is correct and the instrument has been properly calibrated.

Thoroughly clean the asrm faces with toluene, 2 6. The refractive index at this wavelength is denoted as nD. If the observed refractive index for the chosen reference material at a specied test temperature differs by more than 0.