Sartorius balance

Fig. 7.15 (a) Sedimentation balance with pan in the suspension, (b) Sedimentation balance with pan in clear liquid (Leschonski modification of the Sartorius balance)... 

In the Sartorius balance [66-68] the pan is suspended in the suspending liquid and a correction has to be applied for the particles which fall between the rim of the pan and the sedimentation vessel. In this instrument, when 2 mg of sediment has deposited, electronic circuitry activates a step-by-step motor which twists a torsion wire to bring the beam back to its original position. A pen records each step on a chart. The manufacturers suggest that about 8% of the powder does not settle on the pan. Leschonski [69] and Leschonski and Alex [70] reported losses of between 10% and 35%, depending on the fineness of the powder the difference was attributed to the pumping action of the pan as it re-balances. 

The thermogravimetric experiments were performed under purified hydrogen flow on a Sartorius balance. 

Phase diagram determination. Each component (anhydrous toluene, Triton X-100 and bnPyrNTf2) was added by weight under inert atmosphere on a Sartorius balance with a precision of 0.01 mg. The mixtures were stirred until dear and homogeneous at 27°C. The phase diagram was built by titration with TX-lOO as follows required weight of toluene and bnPyrNTf2 were initially mixed, then TX-lOO was added until transition from turbidity to transparency. 

Sartorius Type ISI 20 balance used for recording in-life body weights. 

Sartorius Type EA15DCE-L balance used for recording maternal body weight at necropsy. 

Sartorius Type LP 220 S balance used for recording maternal organ weights. 

Sartorius Type BDED 200 balance used for recording fetal body weight. 

The electrobalance (I) is a high pressure Sartorius microbalance (type 4436 MP 81, resolution 1 /Jg). The weight of the catalyst is continuously measured and recorded. Nitrogen blanketing prevents damage of the electrobalance by hydrocarbons. The nitrogen (L Air Liquidc (99.8+)) causes an additional dilution of the reaction mixture, A sensitive differential pressure meter (m) (range from -1 till 4 mm H20) indicates the pressure difference between the balance chamber and the reactor. 

The silicide has been used in many expl formulations to increase sensy and power. An early patent claiming this action (Ref 2) incorporates 6—18% of various silicon compds including silicides, with the balance of the expl compn consisting of Amm Perchlorate, NC and TNT in the patents of Segay (Refs 3 and 4), AN and AN-TNT based expls incorporate from 13.8 to 27% calcium silicate and Pronk and Bower (Ref 5) include 15% Ca silicide in their patented Amm Perchlorate based formulations. However, the work of M dard (Ref 6) indicates that with the addn of from 5 to 30% Ca silicide to mixts with either PA or RDX as the principal constituents, an avg increase of only 6.6% in Trauzl (Pb block) expansion resulted when compared to the Traud results of neat samples of either expl. The work of Sartorius (Ref 8) is also pertinent at this point. He investigated expl compns consisting of 85 or 90% PA, PETN, RDX or TNT... 

Sartorius-Werke GmbH developed a clever solution (41). Here the balance and the sample chamber are completely separate, linked magnetically with a simple suspension (Fig. 16), thus alleviating the problem of corrosive gases coming in contact with the balance mechanism. A modem version of this Thermosuspension balance is available from Netzsch. 

Fig. 16. Sartorius Model 4201 magnetic suspension balance. 1, Magnet and coil 2, beam 3, beam fiilcrum 4, suspension ribbon 5, beam magnet 6, suspension magnet 7, observation window 8, upper glass body 9, lower glass body 10, sample pan (41).

In Figure 5 is represented the normal sorption hysteresis of the hazardous coal sample. It is an open hysteresis function measured by Sartorius 4112 Type micro balance applicable to 12 MPa pressure fl.3]. The open hysteresis indicates that at very low equilibrium pressure range a great amount of methane remains in the inside structure of coal. This phenomenon cannot only be explained by very slow kinetic process of desorption because the remained amount of methane is independent of time required to formation of desorption equilibrium pressure. The remained amount of methane can better be emphasized by data shown in Figure 6. 

Instrument for gravimetric measurements of pure gas adsorption equilibria using a two beam balance (Sartorius Th. Gast, 4104 S). 

The bursitis has as its cause trauma to the area, acute or chronic, as well as any dysfunction affecting the ischium or the structurai integrity of the knee joint. The patient reports pain at the medial aspect of the knee, but careful palpation will elicit point tenderness below the knee joint that is very specific and localized in its nature. The pain will be made worse with contraction of the semitendinous, sartorius, and gracilis muscles. An evaluation for somatic dysfunctions of the pelvis, sacrum, and lumbar region, as well as the postural balance of the lower extremity, must be performed. Treatment can be a local injection of a steroid, a prescription for a NS AID, ice, exercises, and osteopathic manipulative treatment (OMT) of all somatic dysfunctions, including knee, hip. and pelvic region. 

It was taken 2 h to complete the oxidation tests based on thermo-gravimetric analysis method (TGA). The variation of the speeimen mass vs. testing time was recorded every 5 s by eontinuous weight measurements. The measured data were stored in a PC coimecting to an electronic balance (Sartorius, BS124S, Max 120 g, resolution 0.0001 g). Isothermal oxidations of the inert anode materials were measured at 700 °C, 750 C, 920° C, and 950° C, respectively, with an oxygen flow of 0.6 L/min. 

Microstructure of the sintered samples was analyzed using the FESEM. The density of the sintered samples was measured by Archimedes method (BP210S balance, Sartorius AG, Germany) with isopropanol as the immersion medium. XRD analysis was carried out for the powders before and after sintering to determine the chemical composition of each nanocomposite. The fractured surface of the samples was also analyzed using the FESEM. 

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