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RADOSYS User Manual
File Ref. RS_Man82
Page
4-16
Revised at 7/8/2013
4.3.2.7 Neutralization bath
Prepare a diluted synthetic vinegar solution by adding 200ml of 15% or 20% vinegar into
4000 ml of distillated water. Pour the solution into the bath tank. After a few minutes
drain the neutralized fluid into a laboratory plastic container.
4.3.2.8 Final washing bath
Pour 4000ml of washing distillated water into the bath tank. Drain the washing water into
a laboratory plastic container.
4.3.2.9 Rinsing and drying
Open the cover door of the etching unit and remove the etching drum. Place it to a
laboratory tray for rinsing and drying. After an hour of drying the detector holders with
the radon test plastic pieces can be taken for evaluation at the Radometer track
evaluation unit.
4.3.2.10
Storage of the chemicals
The hot sodium-hydroxide solution should be stored in heat-proof laboratory glass. The
neutralization and final washing water bath can be stored in any plastic container.
4.3.2.11
Waste chemical treatment
Concerning the disposal of the used chemicals, the sodium-hydroxide solution should be
treated with extreme attention. It can not be disposed directly because of environmental
safety reasons. Two alternative methods can recommended for the disposal. This can
be disposed either by neutralization or by proper dilution. One liter of sodium-hydroxide
solution can be neutralized by adding four liter 15% vinegar solution. The proper dilution
rate in tap water is an other method. Concerning the permitted dilution rate, please
consider the local environmental standard or consult a environmental safety engineer.
Chapter 4.
Routine operation
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