1—31
Bromine, Total, HR, continued
Note:
If the sample temporarily turns yellow after reagent addition, or if the display shows
overrange (page 2—12), dilute a fresh sample and repeat the test. A slight loss of bromine
may occur because of the dilution. Multiply the result by the appropriate dilution factor.
Sampling and Storage
Analyze samples immediately. Do not collect samples in plastic containers.
Accuracy Check
Standard Additions Method
1. Snap the neck off a high range Chlorine Standard Solution Voluette
®
Ampule,
25–30 mg/L Cl
2
.
2. Use a TenSette
®
pipet to add 0.1, 0.2, and 0.3 mL of standard to three separate
5-mL samples. Swirl gently to mix.
3. Analyze 5 mL of each sample as described in the procedure. Each 0.1 mL of
standard will cause an incremental increase in bromine concentration. The
exact value depends on the concentration of the ampule standard. Check the
certificate enclosed with the standard ampules for the chlorine concentration.
Multiply the expected chlorine concentration by 2.25 to determine the
expected increase in bromine concentration.
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