LaMotte SMART3 Colorimeter - Manual (Page 90)

APPLICATION: Corrosion and rust inhibitors in cooling water systems
RANGE: 0.0 – 30.0 ppm Benzotriazole
0.0 – 30.0 ppm Tolyltriazole
MDL: 0.5 ppm Benzotriazole
0.5 ppm Tolyltriazole
METHOD: Benzotriazole and tolyltriazole are UV-photolyzed in a
buffered solution with a pH between 4 and 6. A yellow
color develops in proportion to the concentration of triazole
present.
SAMPLE
HANDLING &
PRESERVATION:
Samples should be analyzed as soon as possible after
collection.
INTERFERENCES: Tolyltriazole with interfere in the benzotriazole test.
Benzotriazole will interfere in the tolyltriazole test. Strong
reducing or oxidizing agents will interfere.
BENZOTRIAZOLE/TOLYTRIAZOLE SMART3 Test Procedures 11.10
Test P
rocedures