10
11
Pay attention to push the cuvette completely down in the holder.
• In order to avoid reagent leaking and to obtain more accurate measure-
ments, close the cuvette first with the supplied HDPE plastic stopper
and then the black cap.
• Each time the cuvette is used, the cap must be tightened to the same degree.
• Whenever the cuvette is placed into the measurement cell, it must be dry
outside, and free of fingerprints, oil or dirt. Wipe it thoroughly with
HI 731318
or a lint-free cloth prior to insertion.
• Shaking the cuvette can generate bubbles in the sample, causing higher
readings. To obtain accurate measurements, remove such bubbles by
swirling or by gently tapping the cuvette.
• Do not let the reacted sample stand too long after reagent is added, or
accuracy will be lost.
• It is possible to take multiple readings in a row, but it is recommended to
take a new zero reading for each sample and to use the same cuvette for
zeroing and measurement when possible (for most precise results follow the
measurement procedures carefully).
• Discard the sample immediately after the reading is taken, or the glass might become permanently
stained.
• All the reaction times reported in this manual are at 20°C (68°F). As a general rule of thumb, they
should be doubled at 10°C (50°F) and halved at 30°C (86°F).
REAGENT BLANK CORRECTION
• Some methods require a “reagent blank correction”. The blank and the sample are prepared exactly
in the same way, only the blank is deionized water instead of sample.
A blank cuvette may be used more than once: stability and storing conditions are described for each
method in the related chapter.
INTERFERENCES
• In the method measurement section the most common interferences that may be present in an average
wastewater matrix have been reported. It may be that for a particular treatment process other
compounds do interfere with the method of analysis.
METHOD REFERENCE TABLE
HI83200 - LABORATORIES
Method
Method
Page
description
1
Aluminum
21
2
Alkalinity
23
3
Ammonia MR
25
4
Ammonia LR
27
5
Bromine
29
6
Calcium
31
7
Free Chlorine
33
8
Total Chlorine
36
9
Chlorine Dioxide
39
10
Chromium VI HR
42
11
Chromium VI LR
44
12
Color of Water
46
13
Copper HR
48
14
Copper LR
50
15
Cyanide
52
16
Cyanuric Acid
55
17
Fluoride
57
18
Calcium Hardness
59
19
Magnesium Hardness 62
20
Hydrazine
65
21
Iodine
67
22
Iron HR
69
23
Iron LR
71
Method
Method
Page
description
24
Magnesium
74
25
Manganese HR
76
26
Manganese LR
78
27
Molybdenum
81
28
Nickel HR
84
29
Nickel LR
86
30
Nitrate
89
31
Nitrite HR
91
32
Nitrite LR
93
33
Dissolved Oxygen
95
34
Ozone
97
35
pH
100
36
Phosphate HR
102
37
Phosphate LR
104
38
Phosphorus
106
39
Potassium HR
108
40
Potassium MR
111
41
Potassium LR
113
42
Silica
115
43
Silver
118
44
Sulfate
121
45
Zinc
123
HEALTH & SAFETY
The chemicals contained in the reagent kits may be hazardous if improperly handled. Read the
Material Safety Data Sheet (MSDS) before performing tests.
Safety equipment: Wear suitable eye protection and clothing when required, and follow instructions carefully.
Reagent spills: If a reagent spill occurs, wipe up immediately and rinse with plenty of water.
If reagent contacts skin, rinse the affected area thoroughly with water. Avoid breathing released vapors.
