Siphon recorder

Heber-pumpe, /. siphon pump, -rohr, n. siphon tube or pipe, siphon. -sauremesser, m. syringe hydrometer for acids, -scbreiber, m. siphon recorder. 

Figure 2 The siphon recorder (a) was the world s first practical ink-jet device and was invented by Wiiiiam Thomson (b) in 1858. Reprinted from http // en.wikipedia.org/wiki/Lord Kelvin (accessed 6 September 2010).

By using a sampling device, the ions are siphoned from the end of the plasma flame and led into an ion mass analyzer, such as a quadrupole instrument, where the abundances of the ions and their m/z values are recorded. 

The reaction product, which is a dark reddish-brown liquid, is poured or siphoned (Note 5) into 1.5 1. of water to which 50 cc. of a saturated solution of sodium bisulfite has been added (Note 6). The mixture is distilled with steam (Org. Syn. 2, 80) and the first portion of the distillate is collected separately to remove a small amount of unchanged nitrobenzene. It is necessary to collect about 12 1. of distillate in order to obtain all of the m-bromonitrobenzene. The yellow crystalline solid is filtered with suction and pressed well on the funnel to remove water and traces of nitrobenzene. The yield of crude product varies from 270-340 g. (60-75 Per cent °f the theoretical amount). It melts at 51.5-520 and boils at 117-118 79 mm. This product is satisfactory for most purposes. If a purer material is desired, the crude /w-bromonitrobenzene may be distilled under reduced pressure. The recovery on purification is about 85 per cent. Briihl recorded the b.p. as 1380/18 mm. and the m.p. as 56° for pure wz-bromonitrobenzene.1... 

The elution volume (also called the retention volume) is the volume of solvent that has passed through the GPC column from the time of injection of the sample. It is conveniently monitored by means of a small siphon, which actuates a marker every time it fills with eluant and dumps its contents. The raw GPC data are thus available as a trace of detector response proportional to the amount of polymer in solution and the corresponding elution volumes. A typical GPC record (gel permeation chromatogram) is shown in Fig. 4.19. 

Gumensky, D.B. (1935). Principles of siphon design for Colorado River Aqueduct. Engineering News-Record 114(Jun. 27) 899-903. P... 

Anonymous (1941). Doland, James Joseph. Who s who in engineering 5 472. Lewis New York. Anonymous (1959). Doland, James Joseph. Who s who in America 28 708. Marquis Chicago. Doland, J.J. (1930). Design of monolithic concrete siphons simplified by use of diagrams. Engineering News-Record 104(26) 1047-1052. 

Hall, L.S. (1924). Discharge of irrigation siphons in California. Engineering News-Record 93(26) 1024-1025. 

It is noted that curvature of the t/ V V5. V plot can occur for a number of reasons and may appear over regions other than the end period of filtration. Curvature can be observed to differing extents at both short and intermediate filtration times, and choosing the limit of the linear portion on the Characteristic Plot in order to apply equations (4.9)-(4.11) must be done with care. If the technique is applied without some feeling for the consequences (and the reasons for plot curvature), then false answers may ensue. Also, where a filtration test is stopped before all the suspension is filtered then only values recorded at the end of the filtration test have physical meaning and equations (4.9) and (4.10) caimot be used. In this case suspension remains above the cake which must be siphoned away before the cake is sampled in order to achieve an accurate analysis. 

The simplest way to use the tubeless siphon is to record the maximum height rise that can be achieved when one applies full vacuum. However, strain rates and tensile stress can be obtained with the same analysis used for fiber spinning except that the sign of the gravity term in eq. 7.5.8 is now positive. This tends to destabilize the flow and reduce the fiber length. Another problem with the... 

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