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Problem type
Chemistry related
Chemistry related
Table 14 Troubleshooting problems (continued)
Problem description
The ammonia peaks are
very small.
Other ammonia method
issues:
Too much NaOH in the
buffer may cause staining
in the tubing after the
heater. This may also be
caused by using
household bleach.
The QuikChem method
shows support data that
cannot be generated on
the system.
Solution
Make sure the pH at the waste line is 13.
Use the hypochlorite solution recommended in the method. Do
not degas the solution.
Make sure the heater is set at 60 °C. The manufacturer
recommends using a reagent-grade 4–6% hypochloride solution.
Make sure all the QuikChem method steps are followed. Any
changes in the reagent recipes or manifold may cause
problems. Some of the reagent recipes are not identical to
reference methods. Do not substitute chemicals.
Make sure the manifold is correct. Verify the wavelength of the
interference filter. Look for flow problems.
Troubleshooting
81
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Table of Contents
Troubleshooting
