Hanna Instruments HI 4012 User Manual

Page 15

Plot generated on Hanna HI 901 Titrator during

Plot generated on Hanna HI 901 Titrator during
automated lead titration using HI 4112 electrode.

automated lead titration using HI 4112 electrode.

Notes:

•

Use of the methanol/formalin antioxidant is

advised to increase sensitivity.

•

pH adjustment of the sample to 4-7 pH is advised to

favor the Pb-EDTA formation constant.

XIV. S

XIV. Storage and Care of the HI 4012 and

torage and Care of the HI 4012 and

HI 4112 sensors

The HI 4012 and HI 4112 sensor can be stored in very
dilute standards (<10

-3

M) for short periods of time.

The HI4012 should be stored dry with it’s protective cap
on for longer periods. For longer term storage of the
model HI 4112 combination electrode ;Drain and wash
of salts with distilled or deionized water. Unscrew the
upper cap and move outer sleeve up cable. Wrap the
ceramic junction on the inner stem with Parafilm

® or

other sealing wrap. Place the protective cap provided
over the dried membrane and store in original storage
box provided with electrode.
XV

XV.

. Conversion T

Conversion T

Conversion Tables For Pb

ables For Pb

Multiply

Moles/L (M) to ppm (mg/L)

2.072 x 10

ppm (mg/L) to M (moles/L)

4.826 x 10

-6

XIII.

XIII.pH

HI 4112 and HI 4012 electrodes may be used in solutions
with pH values between 4 and 6. Samples that fall beyond
this range should be adjusted with perchloric acid or sodium
hydroxide.

This manual is related to the following products:

HI 4112