Navigator 600 Phosphate
Multi-stream
Appendix A – Solutions
IM/NAV6P/MS–EN Rev. F
63
Appendix A – Solutions
A.1 Reagent Solutions
A volume of 2.5 l of each reagent solution maintains the analyzer
in operation for a minimum of three months. The bottles and
associated tubing are color-coded to identify each reagent.
Contact your local ABB representative for further information
about reagent solutions.ó
A.2 Calibration Solutions
The following instructions are for the preparation of stock
solutions of 1000 mg l
–1
either as P (see step 1) or PO
4
3–
(see
step 2):
1. Phosphate as P
Dissolve 4.393 g (±0.001 g) of analytical reagent grade
potassium dihydrogen phosphate, KH2PO4, in
approximately 500 ml of high purity water,
or
2. Phosphate as PO
4
3–
Dissolve 1.433 g (±0.001 g) of analytical reagent grade
potassium dihydrogen phosphate, KH
2
PO
4
, in
approximately 500 ml of high purity water.
3. Transfer the appropriate solution to a one-liter volumetric
flask and make to volume with more high purity water.
4. Dilute the appropriate stock solution with high purity water
to make the secondary calibration solution. The dilution
should be carried out using polyethylene apparatus
wherever possible.
The stock solutions are stable for at least 3 months.
Warning.
Before handling containers, reservoirs and delivery
systems that contain chemical reagents and
standards, review the Material Safety Data Sheets to
familiarize yourself with handling precautions, dangers
and emergency procedures.
Take care if cleaning any spillages and observe all
relevant safety instructions – see Section 1, page 3.
General cleaning of the instrument must be carried
out using a damp cloth only; mild detergent can be
used as a cleaning aid. Do not use Acetone or any
organic solvents.
Observe all Health & Safety procedures for handling
chemicals.
Note.
The accuracy of the monitor over its total range is
governed by the choice of the secondary standard solution
value. A monitor calibrated at 2 mg l
–1
, for example, would
not exhibit the best accuracy at 10 mg l
–1
.
The concentration of the solution should be chosen to
coincide with the point of greatest required accuracy.
Note.
High purity water, i.e. de-ionized, is used for the
ZERO solution.
