Test Procedures
CYANURIC ACID
MELAMINE METHOD–TURBIDITY • CODE 366I-01-SC
QUANTITY
CONTENTS
CODE
2 x 100 mL
Cyanuric Acid Test Solution
4856-J
1
Syringe, 5 mL
0807
*WARNING:
Reagents marked with an * are considered to be potential health hazards. To
view or print a Safety Data Sheet (SDS) for these reagents go to www.lamotte.com.
Search for the four digit reagent code number listed on the reagent label, in the contents
list or in the test procedures. Omit any letter that follows or precedes the four digit code
number. For example, if the code is 4450WT-H, search 4450. To obtain a printed copy,
contact LaMotte by email, phone or fax.
Emergency information for all LaMotte reagents is available from Chem-Tel:
(US, 1-800-255-3924) (International, call collect, 813-248-0585).
Cyanuric acid is added to swimming pool water as a stabilizing agent for free chlorine
residuals. It minimizes the loss of chlorine from the action of ultraviolet rays in sunlight.
Cyanuric acid levels in pools should be maintained between 25 and 75 ppm and various
public health associations recommend that the concentration should never exceed 100-
150 ppm.
APPLICATION:
Swimming pool water.
RANGE:
0–200 ppm Cyanuric Acid
MDL:
16 ppm
METHOD:
A buff ered solution of melamine forms a precipitate with
cyanuric acid in proportion to the amount of cyanuric acid
present. The amount of particles in suspension is measured
turbidimetrically.
SAMPLE HANDLING &
PRESERVATION:
Cyanuric acid samples should be analyzed as soon as possible
after collection. Deterioration of the sample can be minimized
by keeping samples in the dark or refrigerated until analysis
can be performed.
INTERFERENCES:
No known interference from compounds normally found in
pool water. Temperature of the sample should be maintained
between 70°F and 80°F for best results. Check for stray light
interference (see page 15).
SMART Spectro 2 Test Procedures 05.02.16
CYANURIC ACID
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