Hanna Instruments HI 83205-2008 - Manual (Page 6)

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
HI 83205 - BOILERS & COOLING TOWERS
Method Method Page
description
1 Aluminum 17
2 Ammonia MR 19
3 Ammonia LR 21
4 Bromine 23
5 Free Chlorine 25
6 Total Chlorine 28
7 Chlorine Dioxide 31
8 Chromium VI HR 34
9 Chromium VI LR 36
10 Copper HR 38
11 Copper LR 40
12 Hydrazine 42
Method Method Page
description
13 Iron HR 44
14 Iron LR 46
15 Molybdenum 49
16 Nitrate 52
17 Nitrite HR 54
18 Nitrite LR 56
19 Dissolved Oxygen 58
20 pH 60
21 Phosphate HR 62
22 Phosphate LR 64
23 Silica 66
24 Zinc 69
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.