Hach DR2400 - Powder Pillows; Benzotriazole or Tolyltriazole; Benzotriazole (1 to 16 Mg;L) Tolyltriazole (1 to 20 Mg;L)

DR/2400
Benzotriazole or Tolyltriazole
Benzotriazole_PP_Other_UVP_Eng_Ody.fm Page 1 of 4
• Sample temperature should be 20–25 °C (68–78 °F).
• If sample contains nitrite or borax (sodium borate), adjust the pH to 4–6 with 1 N sulfuric acid (Cat. No. 1270-32).
• If the sample contains more than 500 mg/L hardness (as CaCO
3
), add 10 drops of Rochelle Salt Solution (Cat. No. 1725-33)
before adding reagent.
• Avoid fingerprints on the quartz surface of the lamp. Rinse the lamp and wipe with a soft, clean tissue between tests.
Benzotriazole or Tolyltriazole
Method 8079
UV Photolysis Method*
* Adapted from Harp, D., Proceedings 45th International Water Conference, 299 (October 22–24, 1984)
Powder Pillows
Benzotriazole (1 to 16 mg/L)
Tolyltriazole (1 to 20 mg/L)
Scope and Application: For cooling or boiler water
1. Touch
Hach Programs.
Select program
30 Benzotriazole
or
730 Tolyltriazole.
Touch
Start.
2. Fill a round sample
cell with 25 mL of
sample.
3. Add the contents of
one Triazole Reagent
Powder Pillow.
4. Swirl to dissolve
completely.
Tips and Techniques
Powder Pillows Method 8079
Hach Programs
10 mL
20 mL
25 mL
10 mL
20 mL
25 mL
10 mL
20 m
L
25 mL