73
W3T331759 / WT.050.585.003.UE.IM.1014
MICRO/2000® AND DEOX/2000® MODULE
2.2
Preparation of Potassium Iodide Solution For MICRO/2000®
NOTE:
Potassium iodide solution is used only in the measurement of
total chlorine. Therefore, this section does not apply to analyzers installed
to measure free chlorine or potassium permanganate.
Potassium iodide (KI) is added to distilled water and fed into the water
sample by the metering pump when measuring total chlorine. The KI
reacts with the various forms of chlorine present to release a proportional
amount of iodine. The amount of KI required is dependent upon the
maximum range of the analyser.
The quantity of KI required is calculated as follows:
50 + (4 * range) = grams KI
Example: Analyser range: 5 mg/l
50 + (4 * 5) = 70 grams KI
CAUTION:
Never mix potassium iodide (KI) with sulphuric acid, as
free iodine will form immediately.
Analyser range (mg/l)
KI (g/l)
KI (g/2.5 litre bottle)
Specific Amount
Typical Amount
0 - 0.5
32
80
100g
0 - 1.0
32
80
0 - 2.0
35
87.5
0 - 5.0
41
102.5
200g
0 - 10
50
125
>10
80
170
KI either in tablets or in granular form may be used. When using auxiliary
KI tablets (W2T614371), one tablet equals 3 grams.
2.3
Preparation of Potassium Iodate
Dissolve the correct amount of
Potassium Iodate
into one gallon of
pH4
buffer solution (see chart).
RANGE
PACKAGE NO.
ADD NO. VIALS
± 0.5 mg/l
W2T8468 - 3 grams
1
± 1.0 mg/l
W2T8468 - 3 grams
2
± 2.5 mg/l
W2T8469 - 15 grams
1
± 5.0 mg/l
W2T8469 - 15 grams
2
± 10.0 mg/l
W2T8469 - 15 grams
4
Содержание WALLACE & TIERNAN DEOX/2000
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