Hanna Instruments HI 96101 - Manual (Page 25)

25
INTERFERENCES
Chlorine
Iodine
Ozone
Oxidized forms of chromium and manganese
In case of water with alkalinity greater than 250 mg/L CaCO
3
or acidity greater than 150 mg/L
CaCO
3
, the color of the sample could disappear or develop only partially. To resolve this,
neutralize the sample with diluted HCl or NaOH.
In case of water with hardness greater than 500 mg/L CaCO
3
, shake the sample for approximately
1 minute after adding the reagent.
• Remove the cuvette.
• Add the content of one packet of
HI 93716-0 Bromine reagent. Replace
the cap and shake gently for about
20 seconds to dissolve most of the
reagent.
• Replace the cuvette into the cuvette holder
and ensure that the notch on the cap is
positioned securely into the groove.
• Press and hold READ/ /TIMER for three
seconds. The display will show the
countdown prior to measurement. An
audible “beep” indicates the end of the
countdown period.
• Alternatively, wait for 2 minutes and 30
seconds then just press READ/ /TIMER.
In both cases, the lamp, cuvette and
detector icons will appear on the display,
depending on the measurement phase.
• At the end of measurement, the instrument
directly displays concentration in mg/L of
bromine on the LCD.