Hach DR2400 - Page 571

Oxygen, Dissolved
Oxygen, Dissolved
OxygenDis_AccuVac_UHigh_UHR_Eng_Ody.fm Page 3 of 4
Accuracy Check
The results of this procedure may be compared with the results of a titrimetric
procedure (request Lit. Code 8042) or sens
ion™6 Dissolved Oxygen Meter
(Cat. No. 51850-01).
Method Performance
Precision
Standard: 36.0 mg/L O
2
See Section 3.4.3 Precision on page 44 for more information, or if the standard
concentration did not fall within the specified range.
Sensitivity
See Section 3.4.5 Sensitivity on page 44 for more information.
Summary of Method
The High Range Dissolved Oxygen AccuVac Ampul contains reagent vacuum
sealed in a 12-mL ampule. When the AccuVac Ampul is broken open in a sample
containing dissolved oxygen, it forms a yellow color which turns purple. The
purple color development is proportional to the concentration of dissolved
oxygen. Test results are measured at 680 nm.
Required Reagents
Quantity Required
Description per test Unit Cat. No.
High Range Dissolved Oxygen AccuVac
®
Ampuls,
0–10 mg/L with 2 reusable ampule caps........................................1 ampul........... 25/pkg...............25150-25
Required Apparatus
Polypropylene Beaker, 50-mL, Low Form, with pour spout........................................ each......................1080-41
Sample Cells, 10-mL, w/cap...................................................................1 ....................... 6/pkg.................24276-06
Program 95% Confidence Limits of Distribution
448 33.3–38.7 mg/L O
2
Concentration ∆Abs ∆Concentration
5 mg/L 0.010 0.34 mg/L O
2
20 mg/L 0.010 0.44 mg/L O
2
40 mg/L 0.010 0.64 mg/L O
2