Hanna Instruments HI 83206-2008 - 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.
• 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 83206 - ENVIRONMENTAL TESTING
Method Method Page
description
1 Ammonia MR 17
2 Ammonia LR 19
3 Free Chlorine 21
4 Total Chlorine 24
5 Chromium VI HR 27
6 Chromium VI LR 29
7 Color of Water 31
8 Copper HR 33
9 Copper LR 35
10 Cyanuric Acid 37
11 Molybdenum 39
12 Nickel HR 42
Method Method Page
description
13 Nickel LR 44
14 Nitrate 47
15 Nitrite HR 49
16 Nitrite LR 51
17 Dissolved Oxygen 53
18 pH 55
19 Phosphate HR 57
20 Phosphate LR 59
21 Phosphorus 61
22 Silica 63
23 Silver 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.