Westphal Specific Gravity Balance

The Westphal specific gravity balance is a device that will measure the specific gravity directly if water is one of the liquids. It applies two concepts ... 

Arthur H. Thomas Hydrometer for Liquids Lighter than Water Westphal Specific Gravity Balance Pycnometer Specific Gravity Bottle Lypkin Pycnometer... 

Specific Gravity,—This can be determined in the usual way, with the Westphal balance, the picnometer, or the densimeter, at 150. The following procedure is the most common and is carried out on the milk as it stands or on the whey. 

Specific Gravity.—This is measured by means of a hydrometer or, more accurately, by a picnometer. The viscosity renders it difficult to use a Westphal balance. 

The specific gravity of a beer, also termed " present gravity " or attenuation gravity, is determined on the gas-free beer at 15 5° C. (6o° F.)—with reference to water at the same temperature—by means of a specific gravity bottle or a Westphal balance (see Spirits). 

Specific Gravity.—This is determined at 150 by means of the Westphal balance (see chapter on Spirits). 

Before making use of the alcoholic liquid thus diluted, it is always advisable to verify, by means of the Westphal balance, the specific gravity, which should be exactly 0-9656 at 150 C. 

Specific Gravity.—The sp. gr. of tanning solutions is determined (usually at 150 C.) with the Westphal balance or with a hydrometer or, in industrial practice, with the Baume hydrometer.2... 

Analysis gave 76.68 and 76.85 per cent bromine, the theory being 76.88 per cent bromine. The yield is almost quantitative. The specific gravity by the Westphal balance method is 2.688 at 20°C. It freezes at — 52°C. Thionyl bromide decomposes slowly on standing and should be kept in bottles with tight-fitting glass stoppers. 

In AOCS Official Method Cc 10b-25 (Firestone, 1998) for determining the specific gravity of solid fats at 25°C, the specific gravity of an ethanol-water mixture, in which a small solid sample of the fat neither sinks nor floats, is measured using a Westphal balance (which utilizes the Archimedes buoyancy principle). The specific gravity of the fat sample is equal to this measured value. 

Specific Gravity. 1.3lto.01 at 15.5Vl5.5° as detd by Westphal Balance or by pycnometers (See Vol 3 of Encycl, pp D6S to D71, under Density and Specific Gravity)... 

Westphal balance Special kind of balance used for the determination of the specific gravity of liquids or solids, by a direct weighting method. 

Specific Gravity at 15° 0. This may be taken by means of a Westphal balance, or by using a picnometer of either the ordinary gravity bottle shape, with perforated stopper, or the Sprengel U-tube. The picnometer should be calibrated with distilled water at 15° C. The specific gravity of solid fats may be taken at an elevated temperature, preferably that of a boiling water bath. 

The specific gravity is preferably taken in a bottle or U-tube, but if sufficient of the oil is available and a high degree of accuracy is not necessary, it may be taken either with a Westphal balance, or by means of a hydrometer. 

Specific gravity is determined at 15 0., and may be taken in a specific gravity bottle, or with a Westphal balance or hydrometer. It usually ranges from 1 3 to 1 31. 

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