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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Caution should be taken when handling mercury and mercury containing products. NOTE 9—When successive readings are drifting, the direction of drift will indicate what is happening to the sample.

Preparation of Apparatus Reasonable precautions should be taken to minimize these factors. Caution should be taken when handling mercury and mercury containing products. When a new QC sample material is required, control limits for the new material should be established before the old QC sample atsm exhausted. This effect leads to calibration drift, which must be periodically corrected to ensure measurement reliability.

Signicance and Use 5.

Refractive Index Measurements According to ASTM D1218

D asym 02 X2. However, when it is demonstrated that the test method is under statistical control, the QC testing frequency may be reduced. Warning—2,2,4trimethylpentane, methylcylcohexane, and toluene are all ammable. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

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ASTM D(R07)_百度文库

Jul 17 Read For convenience in calculations, the value of the difference thus obtained is usually multiplied by 10 For hydrocarbon liquids, the coefficient will typically be in the range -3 3 to -5 3 Spectro Scientific acquired by Ametek Dec 14 Read Dec 17 Read Allow 3 min temperature equilibration time. Other light sources include mercury, cadmium, helium, and hydrogen where lters are used with the refractometer to eliminate unwanted emission lines. Dec 14 Read Apply a drop of 1-bromonaphthalene contact liquid, about 1.

This combination of instruments is the first step to a modular measuring system called the Modulyser Unlimited Class. Based on this, it may be possible on some models to set an automatic delay time for readings. Reagents and Materials 7. Some instruments offer a wider measuring range but it is important to verify the uniformity of accuracy across the entire measuring range and to ensure suitable calibration materials are available for this verication.

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Refractive Index Measurements According to ASTM D Petro Online

Different substances have varying degrees of refractive dispersion sometimes called dispersive power. Sep 19 Read Originally published as Lawrey, D. Trending Articles Risks and side effects The underestimated dang The test method may be suitable for measuring the refractive indices of liquids above 1. Any calibration uid could be used.

C1218 liquids have a higher temperature coefficient than water and aqueous solutions. This is the relative index of refraction. The refractive index at this wavelength is denoted as nD. The accuracy and resolution of the temperature measuring device shall be 0. Discover the gold at the bottom of the barrel.

Record or report, or both, this value as the refractive index of the sample at the test temperature. No other units of measurement are included in this standard.

Post questions, thoughts or simply whether you like the content. The temperature control unit external or internal shall have the following control specication: Make your daily measuring routine a piece of cake: