User Manual

70 71
Iron LR
IRON LOW RANGE
SPECIFICATIONS
Range 0 to 400 µg/L
Resolution 1 µg/L
Accuracy ±10 µg/L ±8% of reading at 25 °C
Typical EMC ±1 µg/L
Deviation
Light Source Tungsten lamp with narrow band interference filter @ 575 nm
Method Adaptation of the TPTZ Method. The reaction between iron and the reagent causes a
violet tint in the sample.
REQUIRED REAGENTS
Code Description Quantity
HI 93746-0 TPTZ Reagent 2 packets
REAGENT SETS
HI 93746-01 Reagents for 50 tests
HI 93746-03 Reagents for 150 tests
For other accessories see page 128.
MEASUREMENT PROCEDURE
Select the
Iron LR
method using the procedure described in
the
Method Selection
section (see page 12).
Fill one graduated mixing cylinder up to the 25 mL mark
with deionized water.
Add the content of one packet of HI 93746-0 TPTZ
reagent, close the cylinder and shake vigorously for 30
seconds. This is the blank.
Fill a cuvette with 10 mL of the blank up to the mark and
replace the cap.
Place the cuvette into the holder and close the lid.
Iron HR
Reinsert the cuvette into the instrument.
Press Timer and the display will show the countdown prior to the measurement or, alternatively, wait
for 3 minutes and press Read. When the timer ends the meter will perform the reading.
The instrument displays concentration in mg/L of iron.
INTERFERENCES
Interference may be caused by:
Molybdate Molybdenum above 50 ppm
Calcium above 10000 ppm (as CaCO
3
)
Magnesium above 100000 ppm (as CaCO
3
)
Chloride above 185000 ppm.
12
3
6
9
30"
10 mL
25 mL