Phenols
Phenols
Phenols_None_Other_4AM_Eng_Ody.fm Page 3 of 6
Interferences
Sample Collection, Storage and Preservation
Most reliable results are obtained when samples are analyzed within four hours
after collection. Use the following storage instructions only if prompt analysis is
not possible. Collect 500 mL of sample in clean glass containers and add the
contents of two Copper Sulfate Powder Pillows (Cat. No. 14818-66). Adjust the
pH to 4 or less with 10% Phosphoric Acid Solution (Cat. No. 14769-32). Store at
4 °C (39 °F) or lower and analyze within 24 hours.
13. Drain the chloroform
layers into separate
sample cells (one for the
blank and one for each
sample).
Proceed promptly
through the rest of the
procedure because the
chloroform will evaporate
and cause high readings.
The water phase contains
chloroform, which is
hazardous. Dispose of
properly.
14. Wipe the blank and
place it into the cell
holder.
15. Touch Zero.
The display will show:
0.000 mg/L Phenol
16. Wipe the prepared
sample and place it into
the cell holder.
Touch
Read.
Results will appear in
mg/L Phenol.
Interfering Substance Interference Levels and Treatments
pH The sample pH must be between 3 and 11.5 for best results.
Oxidizing or reducing agents May interfere. Distill samples (see procedure below).
Sulfides or suspended matter
Distillation or the following pretreatment is necessary:
1. Fill a clean 500-mL graduated cylinder with 350 mL of sample. Pour the sample into a clean
500-mL Erlenmeyer flask.
2. Add the contents of one Sulfide Inhibitor Reagent Powder Pillow (Cat. No. 2418-99).
Swirl to mix.
3. Filter 300 mL of the sample through a folded filter paper (Cat. No. 1894-57).
Use this solution in step 5.
10 mL
20 mL
25 mL
10 mL
20 mL
25 mL
10 mL
20 mL
25 mL
Zero
10 mL
20 mL
25 mL
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