PerkinElmer aanalyst 200, Руководство пользователя

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Troubleshooting
10-4
Flame Analysis Troubleshooting
Some possible problems associated with flame analyses are listed below along with probable
causes and suggested remedies. It is suggested that you use this checklist to diagnose possible
problems before contacting service for assistance.
Possible Cause of Problem Check and/or Remedy
Results
erroneously
high Corrections may not have been made
for reagent blank. Zero the instrument while aspirating a
reagent blank.
Ionization enhancement may be present
in sample or blank. Add approximately 1000 mg/L of an
easily ionized salt (such as potassium,
lithium, or lanthanum) to samples,
standards, and blank.
Standard solutions may have
deteriorated or may have been
improperly made. Restandardize with a proven
standard.
Background absorption (molecular
absorption, light scattering, etc.) may be
present. This is especially likely to
occur below 330 nm or where a high
concentration of a refractory matrix is
encountered. Use a background corrector or, if
applicable, use a nitrous oxide-
acetylene flame.
The sample matrix may be less viscous
than the standards. Remake the standards in the same
matrix as the samples or use the
method of additions.
Results
erroneously
low Matrix interferences (chemical, bulk,
viscosity) may be present. Separate the interferent, match the
sample matrix in your standards, or
use the method of additions. Add
matrix modifiers required to control
chemical interferences.
Ionization enhancement may be present
in the standard but not the sample. Add approximately 1000 mg/L of an
easily ionized salt (such as potassium,
lithium, or lanthanum) to samples,
standards, and blank.
Standard solutions may have been
improperly made. Rerun proven standards.
Blank solution may be contaminated. Change blank.