Navigator 600 Silica
Single-stream Appendix A – Solutions
IM/NAV6S/SS–EN Rev. E 65
A.3 Cleaning Solution
It is important that the internal pipework of the analyzer is
cleaned using the automatic cleaning schedule – see
Section 7.4, page 46. This prevents gradual fouling by
molybdate precipitation in the pipework which can introduce
errors and cause noise.
Regular cleaning is normally performed using a regular cleaning
solution – see Appendix A.3.1. If the pipework in the analyzer is
extremely dirty or the tubing has become blocked, extra
strength cleaning solution can be used – see Appendix A.3.2.
The analyzer may take some time to stabilize after the clean if
the stronger solution is used.
A.3.1 Regular Cleaning Solution (for Automatic Cleaning
Operation)
To prepare 1 liter of regular cleaning solution:
1. Dissolve 5 g of analytical grade sodium hydroxide pellets,
NaOH, in approximately 600 ml of high purity water in a
plastic container. Allow the solution to cool to ambient
temperature.
2. Add to the solution 1 g analytical grade di-sodium EDTA
and stir to dissolve.
3. Transfer the solution to a 1 liter measuring cylinder and
make to the mark with more high purity water. Mix well
and store in a tightly stoppered plastic bottle.
A.3.2 Extra Strength Cleaning Solution (for Troubleshooting
and More Intense Wet Section Cleaning)
To prepare 1 liter of extra strength cleaning solution:
1. Dissolve 50 g of analytical grade sodium hydroxide pellets,
NaOH, in approximately 600 ml of high purity water in a
plastic container. Allow the solution to cool to ambient
temperature.
2. Add to the solution 5 g analytical grade di-sodium EDTA
and stir to dissolve.
3. Transfer the solution to a 1 liter measuring cylinder and
make to the mark with more high purity water. Mix well
and store in a tightly stoppered plastic bottle.
A.3.3 Safety Labels
Attach safety labels to all bottles as shown in Fig. A.1.
Warning. Sodium hydroxide is extremely caustic and must
be handled with great care. Wear gloves and eye protection.
Fig. A.1 Safety Labels
CORROSIVE
HARMFUL
IRRITANT
CORROSIVE
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