Borosilicate tubing

Fig. 7.1. Borosilicate tube with sintered glass filter and end seals.

Single-mode microwave reactor equipped with a pyrometer (300 W) Reaction vessel (10 ml borosilicate tube)... 

Most chemical attack on samples is undertaken in glassware. Except where special equipment is required or constant shaking is necessary, all such attacks on rock, soil or sediment samples can be carried out in test tubes, the most convenient type being medium-wall rimless borosilicate tubes, size... 

Polymerization of cis- or trans-pentadienes as inclusion compounds with deoxycholic acid, by y-irradiation, gave optically active polymers.The electrochemical determination of vitamin D in the presence of vitamin A has been explored. Substantial losses of corticosterone and its 11-deoxy-derivative occurred when methanolic solutions were evaporated in soda-lime test tubes, although borosilicate tubes were satisfactory. The fire and explosion hazards have been assessed for a variety of commercial steroids in aerosol form. A review of... 

Polarization transfer has also been observed between HP supercritical xenon and organic solutes. HP xenon was collected as a solid and then transferred to a 3 mm borosilicate tube containing the organic molecule (toluene or biphenyl) at a field of 1 T to avoid relaxation. Proton enhancements were observed to be three (biphenyl) or seven (toluene) times the Boltzmann equilibrium level as measured at 2T and with the xenon polarization at 2%. Several proton acquisitions could be made because the xenon Ty was approximately 7.5 min. The authors suggest that the low cross-relaxation rates observed in both the liquid and now supercritical phases could lead to better polarization transfer in the solid state, albeit with a highly dispersed xenon, such as provided by freezing a supercritical or liquid solution. 

Transfer 5 mL of organic (top) phase to a clean 16x100 mm borosilicate tube. 

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