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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Note 1 — The test method may be suitable for measuring the refractive indices of liquids above 1. Is Fracking xstm Way Forward? The accuracy and asgm of the temperature measuring device shall be 0. An ample supply of QC sample material should be available for the intended period of use, and should be homogeneous and stable under the anticipated storage conditions.
This enables a xed measuring time to be written in to the experimental protocol.
Refractive Index Measurements According to ASTM D1218
Open the prism assembly. And What is it Used For?
This is why instrument manufacturers may specify the instrument accuracy as typically or better than in order to cover a broad application scope. 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.
Most measurements traditionally have been made at the sodium D line Do not introduce an excessive amount because this can slow the thermal equilibration.
The precision of the test method see For convenience in calculations, the value of the difference thus obtained d12218 usually multiplied by 10 Asgm 22 Read Mercury, or its vapor, may be hazardous to health and corrosive to materials.
This standard has been approved for use by agencies of the Department of Defense. The tester contains all required components ac Read comments 0 Do you like or dislike what you have read? Summary of Test Method 4.
Turn on the light source and allow the refractometer to equilibrate astmm 30 min. Lower the sample presser if tted. Measured values are given according to your official product specifications e. Link to Active This link will always route to the current Active version of the standard.
Refractive Index Measurements According to ASTM D Petro Online
New, robust and user-friendly general purpose monitor Dec 17 Read Signicance and Use 5. Solid plates are often preferred for their stability shelf lifebut have the disadvantage of limited accuracy in use because of the errors associated with the placing of the plate on the refractometer prism. Ensure the prism temperature is correct and the instrument has been properly calibrated. When a new QC sample material is aastm, control limits for the new material should be established before the old QC sample is exhausted.
The protocol should also include procedures that govern the control of calibration materials: 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 Dec 14 Read High accuracy Abbe refractometers require a pure spectral light source such as a sodium arc lamp see 6.
If you feel that your comments have not received a fair hearing you should make your views known to asm ASTM Committee on Standards, at the address shown below. Press the reference standard against the surface of the prism face with the polished end towards the light source. New FM approved liquid analyser system is safe for h Similarly, if the circulating liquid temperature is changed, a new calibration sequence will be required. D — 02 Reapproved An American National Standard Standard Test Method for Asrm Index and Refractive Dispersion of Hydrocarbon Liquids1 This standard is issued under the xed designation D ; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.
Dec 17 Read