LaMotte SMART Spectro Spectrophotometer - Manual (Page 132)

CYANURIC ACID
MELAMINE METHOD–TURBIDITY • CODE 366I-SC
QUANTITY CONTENTS CODE
2 x 250 mL * Cyanuric Acid Test Solution *4856-K
1 Syringe, 5 mL 0807
*WARNING: Reagents marked with a * are considered to be potential health hazards. To view
or print a Material Safety Data Sheet (MSDS) for these reagents see MSDS CD or
www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
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: 5–200 ppm Cyanuric Acid
METHOD: A buffered 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 TEST PROCEDURES 05.04 Cyanuric Acid 1/2