LaMotte SMART3 Colorimeter - Manual (Page 93)

BIGUANIDE
COLORIMETRIC METHOD • CODE 4044
QUANTITY CONTENTS CODE
2 X 60 mL Biguanide Indicator 3994-H
1 Pipet, plastic, 1.0 mL 0354
Biguanide is a non-chlorine, non-bromine chemical sanitizer. It is more stable
than chlorine or bromine and has little chemical odor. Biguanide is an effective
bacteriacide but, unlike chlorine and bromine, it does not destroy organic
contaminants. Therefore, hydrogen peroxide is added to biguanide pools on a
regular basis to eliminate organic contaminants. The optimum recommended level
of biguanide is 30 to 50 ppm.
APPLICATION: Swimming pools
RANGE: 0–70 ppm Biguanide
MDL: 2 ppm
METHOD: Biguanide complexes with the proprietary indicator to
produce a colored solution. The color ranges from yellow
through green to blue depending on the biguanide
concentration.
SAMPLE
HANDLING &
PRESERVATION:
Samples should be analyzed as soon as possible.
INTERFERENCES: The only interfering substances that are likely to be
encountered in pool water are oxidized manganese and
oxidizing agents, such as chlorine, bromine and ozone.
SMART3 Test Procedures 11.10 BIGUANIDE
Test P
rocedures