Anatel A643a - Calibration and Validation 83 of 220
RPS - June 2007 - Edition 12
Anatel Operator Manual
Some instrument surfaces may be hot if the sample water is hot. Allow surfaces to cool before
touching.
In a networked environment (see “Network Installation” on page 39), it is important to confirm
the instrument’s Serial Number before proceeding. Operation of the wrong Analyzer could
result in water leakage from the sample vessel when it is removed during this procedure.
The Anatel A643a TOC Analyzer was designed to be calibrated by the user. Anatel provides
pre-packaged reagents to assist the user in simplifying the calibration process and to easily
comply with USP TOC Method <643>. If desired, reagents can be prepared by the user for use
with the A643a TOC Analyzer. User-prepared reagents will not affect or alter the calibration of
the instrument. User prepared standards can be introduced into the analyzer using a
container/closure system that includes a 50 mL glass vial (VWR cat #16171341), a 20 mm
teflon-coated stopper (VWR cat #16171561) and a 20 mm crimp-top aluminum seal (VWR cat
#16171829). The user is responsible for the traceability and USP compliance of all reagents
that are not pre-packaged.
6) Press Enter to continue and wait while the sample line is drained. The remaining time
is counted down on the display.
7) Specify the calibration standard levels to be performed. All three available ppb
concentration levels are enabled by default, indicated by the checkmark (
3) preceding
them. Disable any unwanted levels by pressing the Up and Down Keys to select the
desired concentration, then pressing Enter to edit and Up and Down toggle it on and
off. At least two levels must be selected, however.
Calibration requires at least two Replicates at two levels of Standards. The concentration
of Standards used should bracket the concentration of the samples to be analyzed. Three
Standards with three Replicates each is recommended for the best accuracy of calibration.
Fig 6-2 : Calibration Standard Criteria
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