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Torches - Devitrification • All quartz torches will devitrify

• Running samples with high concentrations of total dissolved solids or running at higher temperatures will speed up this process

• Torches with heavy devitrification will need to be replaced • Try a shorter or ceramic outer tube if you have a lot of trouble with devitrification

Maintenance - Torches • Be cautious when sonicating quartz torches

• Flush with DI water

• Soak in dilute acid and 25% RBS-25

• Make sure that the torch is dry before reinstallation

• Organic deposits can be burned off in a muffle furnace (500 C) or dissolved by soaking the torch in a mix of 3:1 concentrated H 2 SO 4 to 30% H 2 O 2 (Piranha solution)

• Broken quartz torches or torches with heavy devitrification may be repairable