1—51
Specê Secondary Standards for DPD
Chlorine
Note: Due to improvements in the optical system of the Pocket Colorimeter™ II, the
tolerance ranges and values on the Certificate of Analysis of previously
purchased Spec
√ standards may no longer be valid. Obtain a new set of
standards, or use the Pocket Colorimeter II to assign new values to existing
standards.
The DPD Chlorine Spec√ Secondary Standards are available to quickly check
the repeatability of the Pocket Colorimeter™ II instrument (see OPTIONAL
REAGENTS on page 1—55).
After initial measurements for the Spec
√ standards are collected in the low
range (LR) channel, the standards can be re-checked as often as desired to
ensure the instrument is working consistently.
The standards do not ensure reagent quality nor do they ensure the accuracy
of the test results. Analysis of real standard solutions using the kit reagents is
required to verify the accuracy of the entire Pocket Colorimeter system. The
Spec
√ Standards should NEVER be used to calibrate the instrument. The
certificate of analysis lists the expected value and tolerance for each Spec
√
Standard.
5957088.book Page 51 Friday, March 22, 2013 3:54 PM
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