Basic HTML Version
Appendix B
5/20/2009
29
| ← 13” → | | ← 1½” → | | ← 2” → | | ← 2” → | | ½”|
1 2 3 2 4 2 5 2 6
#1 - Platinum gauze
#2 - Quartz wool
#3 - Silver tungstate / Magnesium oxide on Chromosorb
#4 - Silver oxide / Silver tungstate on chromosorb
#5 - Silver vanadate on Chromosorb
#6 - Silver gauze
17.4.3.9.Function of Combustion Tube Packing Material
17.4.3.9.1. Silver Vanadate on Chromosorb
Reacts with and removes chlorine, bromine,
iodine and sulfur contained in the combustion
gases. When absorbing sulfur, it changes color
from yellow to dark brown when saturated. In
absorbing halogens, exhaustion of the silver
vanadate is indicated by color changes on the
surface of the silver gauze at the end of the
combustion tube. Each element forms a
distinctively colored salt deposit – silver
chloride is gray, silver bromide is brown, and
silver iodide is purple. The gauze can be
rejuvenated by heating in the upper, reducing