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Benzotriazole or Tolyltriazole
5.
Put on UV safety
goggles.
25 mL
20 mL
10 mL
9.
Fill another round
sample cell with 25 mL of
sample (the blank).
Interfering Substance
Acrylates (as methyl
acrylate)
Alum
Borate (as sodium
tetraborate)
Chlorine (as Cl
)
2
Benzotriazole or Tolyltriazole
Page 2 of 4
25 mL
20 mL
10 mL
6.
Insert the ultraviolet
lamp into the sample cell.
Turn on the UV lamp.
25 mL
20 mL
10 mL
10.
Place the blank into
the cell holder.
Interferences
Greater than 50 mg/L
Greater than 400 mg/L
Greater than 4000 mg/L. Adjust the pH to 4–6 with 1 N sulfuric acid (Cat. No. 1270-32).
Greater than 20 mg/L
7.
Touch the timer icon.
Touch
.
OK
A 5-minute reaction
period will begin. Low
results will occur if
photolysis (lamp on) takes
place for more or less than
five minutes.
A yellow color will form if
triazole is present.
Zero
11.
Touch
.
Zero
The display will show:
0 mg/L Benzotr
or
0 mg/L Tolyltr
Interference Levels and Treatments
8.
When the timer
beeps, turn the lamp off.
Remove the lamp from
the cell (the prepared
sample). Swirl the cell to
mix thoroughly.
25 mL
20 mL
10 mL
12.
Place the prepared
sample into the cell
holder.
Touch
.
Read
Results will appear in
mg/L Benzotr or mg/L
Tolyltr.
Benzotriazole_PP_Other_UVP_Eng_Ody.fm
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