Micro boiling-point apparatus

Fig. 21.VIII J. Micro Boiling-point Apparatus in Heating Bath...

Apparatus Thiele melting-point apparatus, micro boiling-point apparatus, and a Bunsen burner or microburner. 

One design of the micro steam simultaneous distillation extraction apparatus is given in Figure G 1.2.1. Both sample and solvent flasks are heated to their boiling points. Vapors coming from the sample and solvent flasks (Figure Gl.2.1, G and F) are mixed in the... 

Concentration can be performed under a gentle stream of inert gas or with a micro-concentration apparatus (e.g., Kudema-Danish sample concentrator, Supelco, or microconcentrator). This step generates volatile losses (mainly very volatile compounds that have a boiling point lower than the solvent) and will modify the quantitative ratio. 

The concentration of solutions, the removal of solvents or volatile constituents of a solution and then taking to dryness are usually conducted in glass, porcelain or platinum dishes or crucibles. The apparatus shown in Fig. 10 is well suited to such operations. It consists of an aluminum block with a thermometer well. Depressions for two or three micro crucibles are hollowed out and a small glass bell jar with stopcock fits tightly on the block. Water and volatile materials are readily removed under reduced pressure in this apparatus at temperatures below the normal boiling points. If the bell jar is set on a well-ground glass plate, it may be employed as a micro desiccator. ... 

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