Thermo Scientific iCAP 7000 Series Manual page 62

iCAP Customer Familiarisation Manual iCAP Customer Familiarisation Manual
usually indicative of dripping. In a usually indicative of dripping. In a
glass or Teflon chamber the chamber glass or Teflon chamber the chamber
should be wetted properly; that is
there should be no water droplets there should be no water droplets
building up on the walls of the spray building up on the walls of the spray
chamber.
This is usually caused by an oily film This is usually caused by an oily film
and can be easily cured by aspirating and can be easily cured by aspirating
a 0.1% HF acid solution for about 20 a 0.1% HF acid solution for about 20
seconds.
HF however, will cause a problem HF however, will cause a problem
with Si analysis for a short time with Si analysis for a short time
afterwards. If Si is being analysed try afterwards. If Si is being analysed try
using a 0.01%Triton X Triton X-100 solution.
This solution is also good for the This solution is also good for the
polypropylene spray chamber polypropylene spray chamber
Other causes of poor precision can be Other causes of poor precision can be
in the expendable parts such as in the expendable parts such as
nebuliser and torch/centre tube. nebuliser and torch/centre tube.
Spares should always be available Spares should always be available
and these should be substituted one and these should be substituted one
by one to observe the result. If the by one to observe the result. If the
nebuliser is the culprit, check the nebuliser is the culprit, check the
inside of the orifice, by removing the the orifice, by removing the
gas fitting, then with a magnifying gas fitting, then with a magnifying
glass look for any small obstruction glass look for any small obstruction
Also check the capillary for Also check the capillary for
obstructions.
Page 62 of 72
operly; that is
Dirty Spray Chamber
.
Clean Spray Chamber
.
This document is part numbered 849940090071 This document is part numbered 849940090071 Version 1.02