Hanna-instruments HI 83212 Bedienungsanleitung PDF herunterladen (Seite 6)

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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

HI83212 - POWER PLANT UTILITIES

Method Method Page

description

1 Ammonia MR 17

2 Ammonia LR 19

3 Free Chlorine 21

4 Total Chlorine 24

5 Copper HR 27

6 Copper LR 29

7 Hydrazine 31

Method Method Page

description

8 Molybdenum 33

9 Phosphate HR 36

10 Phosphate LR 38

11 Phosphorus 40

12 Silica 42

13 Silver 45

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.

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