Hach DR2400 - Page 728

Silver
Silver
Page 2 of 6
Silver_PP_Other_CLR_Eng_Ody.fm
Interferences
Interference studies were conducted by preparing a known silver solution
(about 0.4 mg/L) and the potential interfering ion. The ion was said to interfere
when the resulting concentration changed by ±10%.
5. Fill a cell to the 25-mL
mark with the mixture.
(This is the blank.)
6. Add the contents of
one Sodium Thiosulfate
Powder Pillow to the
blank. Swirl for 30
seconds to mix.
7. Touch the timer icon.
Touch
OK.
A two-minute reaction
period will begin.
8. Fill a second cell to
the 25-mL mark from the
remaining portion of the
mixture. (This is the
prepared sample.)
9. When the timer
beeps, place the blank
into the cell holder.
10. Touch Zero.
The display will show:
0.000 mg/L Ag
11. Place the prepared
sample into the cell
holder.
12. Touch Read.
Results will appear in
mg/L Ag.
10 mL
20 mL
25 mL
10 m
L
20 m
L
25 m
L
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
Read
Interfering Substance Interference Levels and Treatments
Aluminum Negative interference above 30 mg/L
Ammonia Negative interference above 750 mg/L
Cadmium Negative interference above 15 mg/L
Calcium Positive interference above 600 mg/L
Chloride Negative interference above 19 mg/
Chromium
6+
Negative interference above 90 mg/L
Copper Negative interference above 7 mg/L
Iron Negative interference above 30 mg/L
Lead Negative interference above 13 mg/L