Volumeter

This table lists values of /3, the cubical coefficient of thermal expansion, taken from Essentials of Quantitative Analysis, by Benedetti-Pichler, and from various other sources. The value of /3 represents the relative increases in volume for a change in temperature of 1°C at temperatures in the vicinity of 25°C, and is equal to 3 a, where a is the linear coefficient of thermal expansion. Data are given for the types of glass from which volumetic apparatus is most commonly made, and also for some other materials which have been or may be used in the fabrication of apparatus employed in analytical work. 

Bulk Density. Bulk density of fine mica is deterrnined with a Scott-Schaeffer-White volumeter using a 2.54-cm cube. A 7.6-cm diameter cylinder x 12.7-cm long is used to determine the bulk density of coarse mica, eg, oil-weU-grade mica. 

The pressure/composition requirement for miscibility limits the oil reservoirs in which this technology has been appHed. However, the low iajected fluid viscosity often results in poor volumetic sweep efficiency. 

Mengen-bestimmung, /. quantitative determination. -lehre, /. Math.) theory of sets, mengenm sig, a. quantitative. Mengen-messer, m. volume meter, volumeter, -regelung, /. quantity control, -untersu-chtmg, /. quantitative examination, -ver-h tnis, n. quantitative relation, proportion, composition. 

Volum-messer, m. volumeter, -mmderung, /. decrease in volume, -prozent, n. per cent by volume. -prozentgehalt, m. volume-per cent content. 

Apparent Density Determined using a Scott Volumeter, with the following max min requirements for each granulation ... 

Apparent Density (Type A powder only) The apparent density of Type A powder shall not be less than 0.80g/cc when detd using a Scott Volumeter... 

The original method uses the classical weigh powder, dilute volumet-rically scheme. In order to improve the efficiency and at the same time guarantee delivery of results of optimal quality, an extensive review was undertaken. 

Figure 8.16 Gilson differential respirometer. The volume of any gas exchanged can be measured by altering the volume of the test flask using a calibrated syringe system (volumeter) until the original balance in pressure between the test and reference flasks is restored.

Heat to boiling after the sol is formed. Solution evaporation can be avoided by using a relux column or covering the top of the flask with a glass slide. Alternatively, a siliconized 250-mL volumetic flask can be used. 

The instruments for polymer HPLC except for the columns (Section 16.8.1) and for some detectors are in principle the same as for the HPLC of small molecules. Due to sensitivity of particular detectors to the pressure variations (Section 16.9.1) the pumping systems should be equipped with the efficient dampeners to suppress the rest pulsation of pressure and flow rate of mobile phase. In most methods of polymer HPLC, and especially in SEC, the retention volume of sample (fraction) is the parameter of the same importance as the sample concentration. The conventional volumeters— siphons, drop counters, heat pulse counters—do not exhibit necessary robustness and precision [270]. Therefore the timescale is utilized and the eluent flow rate has to be very constant even when rather viscous samples are introduced into column. The problems with the constant eluent flow rate may be caused by the poor resettability of some pumping systems. Therefore, it is advisable to carefully check the actual flow rate after each restarting of instrument and in the course of the long-time experiments. A continuous operation— 24h a day and 7 days a week—is advisable for the high-precision SEC measurements. THE or other eluent is continuously distilled and recycled. 

Bulk volume/tapped volume (Jel STAY 2003 volumeter)... 

Noth. — Regarding the volumetric determination of barium carbonate, see Mohr s Lehrb. CUcm.-anul. Tit.riermeth., 7 ed., p. 133 (1896) Sutton, Volumet. Anal., 9 ed., p. 70 (1904). 

Compare other methods of determining nitrites Sutton, Volumet. Anal., 9 ed., p. 270 (1904). 

F) Apparent Density. It can be detd by means of a "Scott Volumeter 1, described in Ref 4,p 745. The procedure for US specification grade Ba chromate is briefly described in Ref 5>p 5. 

This test may also be conducted by using the "Scott Volumeter" as mentioned in test F under Barium Chloride, Analytical Procedures )Granulation. Use US Std Sieve No 325 and procedure G described under Barium Chromate, Analytical Procedures(Ref 3,p 3)... 

This test may also be conducted by using the Scott Volumeter as mentioned in test F under Barium Chloride, Analytical Procedures... 

Mercuric Acetate Titrant (Caution Mercuric acetate is a strong irritant when ingested or inhaled or upon dermal exposure.) Transfer 3.82 g of mercuric acetate into a 1000-mL volumetric flask containing 950 mL of water. Add 12.2 mL of glacial acetic acid, dilute to volume with water, and mix. Transfer 10.0 mL of this solution into a 100-mL volumet-... 

Bulk Density. Bulk density determinations were made using a Scott paint volumeter (Fisher Scientific Co.) with a 1 in brass receiver to collect the sample. 

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