1—33
Bromine, Total, HR, continued
If a chlorine standard is used, multiply its concentration by 2.25 to determine the
equivalent bromine concentration.
Interferences
Interfering
Substance
Interference Levels and Treatments
Acidity Greater than 150 mg/L CaCO
3
. May not develop full color or
color may fade instantly. Neutralize to pH 6–7 with 1 N Sodium
Hydroxide. Determine amount to be added on separate 10-mL
sample, then add the same amount to the sample being tested.
Correct for the additional volume.
Alkalinity Greater than 250 mg/L CaCO
3
. May not develop full color or
color may fade instantly. Neutralize to pH 6–7 with 1 N Sulfuric
Acid. Determine amount to be added on separate 10-mL sample,
then add the same amount to the sample being tested. Correct
for the additional volume.
Chlorine, Cl
2
Interferes at all levels
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