Hach DR/700 Procedures Manual page 636

OZONE,
continued
chlorine interference. No transfer of sample is needed in the procedure.
Therefore, ozone loss due to sampling is eliminated.
STATISTICAL EVALUATION
Low Range
A single operator repetitively tested samples of the same solutions, using
one DR/700 and two representative lots of AccuVacs. Testing 0.15 mg/
samples, the standard deviation was ±0.009 mg/L O
L O
3
Testing zero concentration samples, the limit of detection was 0.024 mg/L.
Medium Range
A single operator repetitively tested samples of the same solutions, using
one DR/700 and two representative lots of AccuVacs. Testing 0.28 mg/
samples, the standard deviation was ±0.018 mg/L O
L O
3
Testing zero concentration samples, the limit of detection was 0.030 mg/L.
High Range
A single operator repetitively tested samples of the same solutions, using
one DR/700 and two representative lots of AccuVacs. Testing 0.96 mg/
samples, the standard deviation was ±0.024 mg/L O
L O
3
Testing zero concentration samples, the limit of detection was 0.037 mg/L.
The limit of detection was calculated as three times the standard deviation
when testing zero concentration samples (Adapted from Analytical
Chemistry, 1980, 52, 2242-2249).
REQUIRED REAGENTS
Description
Select one or more based on range:
Ozone AccuVac Ampuls
0-0.25 mg/L . . . . . . . . . . . . 2 ampuls . . . 25/pkg . . . . . . . . 25160-25
0-0.75 mg/L . . . . . . . . . . . . 2 ampuls . . . 25/pkg . . . . . . . . 25170-25
0-1.50 mg/L . . . . . . . . . . . . 2 ampuls . . . 25/pkg . . . . . . . . 25180-25
REQUIRED APPARATUS
Beaker, 50 mL . . . . . . . . . . . . . 2 . . . . . . . . . each . . . . . . . . . . . . 500-41
DR/700 Filter Module
Number 61.01. . . . . . . . . . . 1 . . . . . . . . . each . . . . . . . . . . 46261-00
Quantity
Per Test Unit
61-80
.
3
.
3
.
3
Cat. No.