Biguanide – LaMotte SMART3 Colorimeter User Manual

Page 93

BIGUANIDE

COLORIMETRIC METHOD • CODE 4044

QUANTITY

CONTENTS

CODE

2 X 60 mL

Biguanide Indicator

3994-H

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