Glass samples

Manual sampling should be carried out by grounded personnel, preferably using grounded metal equipment such as a metal sample thief bonded to the tank via metal cord. A satisfactory alternative is to place one or more glass sample bottles in a grounded metal cage (5-S.4.2). 

Similarly, glass sample bottles should never be carried by hand. Workers have been injured when bottles they were carrying knocked against projections and broke. Bottles should be carried in baskets or other containers, such as those used for soft drinks. Bottles containing particularly hazardous chemicals, such as phenol, should be carried in closed containers. 

Schau-fenster, n. show window, -glas, n. display glass, specimen glass, sample glass sight glass (Optics) eyepiece, ocular (Meek.) oil gage. 

Table I. Composition of Various Samples Studied Glass Samples Composition (mole fraction...

Figure 3. 4f core level spectra for a series of glasses containing Ca, Za, or B oxide additives (glass sample F, G,... 

Before being glued to the glass sample, one face of each mica sheet has to be coated or spread with a thin layer of silver in 50 — 60 nm thick (reflectivity 96 % —98 %) for facilitating the optical interference. As shown in Fig. 16(a), when a beam of white light goes up vertically through the lower sample and reaches the silver film, the beam is partly re-... 

Fig. 2.1.13 Planar spiral micro-coil of 1.2 mm outer diameter (left), mounted as an exchangeable rf insert on a standard NMR microscopy probe (right) (Bruker-Biospin GmbH, Rheinstetten, Germany). The micro-coil is embedded, together with a glass sample holder, in a slotted PTFE holder.

Powerful and highly homogeneous electromagnet, radio-frequency signal generator and detector circuit, electronic integrator, glass sample tubes. 

Radioactive 22Na was coated onto a glass sample that was made into a diffusion couple (Fig. 5.2) and heated for 4 h at 411°C. The radioactivity perpendicular to the surface is given in the following table. Calculate the tracer diffusion coefficient, D, of 22Na in the glass. 

Figg, D.J., Cross, J. B., and Brink, C. (1998). More investigations into elemental fractionation resulting from laser ablation inductively coupled plasma mass spectrometry on glass samples. Applied Surface Science 129 287-291. 

A Met Glass sample was tested at 400°C with a varying mixture of He and Hj. The desired test gas was introduced into the test chamber and a mass spectrometer was used to monitor breakthrough and gas composition on the test side of the permeation apparatus. The results of the test are shown in Fig. 8. The step pressure changes for the He introduction do not result in He being detected on the sampling side, whereas, when H2 is introduced a pressure is detected by the mass spectrometers almost immediately. 

Fig. 5.12. DIP of a JEOL JMS-700 sector instrament for use with El, chemical ionization (Cl) and field ionization (FI). The copper probe tip holds the glass sample vial and is fitted to a temperature-controlled heater (left). The heater, a thermocouple, and circulation water cooling are provided inside. The (white) ceramics insulator protects the operator from the high voltage of the ion source.

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