Barium
Barium
Barium_AVPP_Other_TUR_Eng_Ody.fm Page 3 of 6
Interferences
Sample Collection, Storage, and Preservation
Collect samples in an acid cleaned glass or plastic container. Adjust the pH to 2
or less with nitric acid (about 2 mL per liter) (Cat. No. 2540-49). Preserved
samples can be stored up to six months at room temperature. Before analysis,
adjust the pH to 5 with 5.0 N sodium hydroxide (Cat. No. 2040-53). Correct the
test result for volume additions (see Section 3.1.3 Correcting for Volume Additions
on page 29).
5. Touch the timer icon.
Touch
OK.
A five-minute reaction
period will begin.
Do not disturb the
sample during the
reaction period.
6. When the timer
beeps, place the blank
into the cell holder.
7. Touch Zero.
The display will show:
0 mg/L Ba
2+
8. Within five minutes
after the timer beep,
place the prepared
sample into the cell
holder.
Touch
Read.
Results will appear in
mg/L Ba
2+
.
Interfering Substance Interference Levels and Treatments
Calcium 10,000 mg/L as CaCO
3
Magnesium 100,000 mg/L as CaCO
3
Silica 500 mg/L
Sodium Chloride 130,000 mg/L as NaCl
Strontium
Interferes at any level. If present, the total concentration between barium and strontium may be
expressed as a PS (Precipitated by Sulfate). While this does not distinguish between barium
and strontium, it gives an accurate indication of scaling tendency.
Highly buffered samples or
extreme sample pH
May exceed the buffering capacity of the reagents and require sample pretreatment (see
Section 3.3 Interferences on page 41).
10 mL
20 mL
25 mL
Zero
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