Halogen, Sulphur, and other Elements

Hard glass (Jena) tubes for sealing (length 35 cm., internal diameter 2-5 cm., wall thickness 1-2 mm.).1 

Small filter tube with Jena glass fritted filter plate (13 f. G 2). 

Halogen-free alcohol and dilute nitric acid (1 100). 

Preparing the Carius Tube.—First clean the tube with bichro- 

1 The tubes can be used repeatedly (three or four times). 

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