5
V. Equipment required:
V. Equipment required:
V. Equipment required:
V. Equipment required:
V. Equipment required:
•
Hanna HI 5315 Double Junction Reference Electrode
with HI 7072 Fill Solution for HI 4007.
•
Hanna HI 4222 pH/ISE/mV meter or other suitable
ion or pH/mV meter. (Note: log/linear graph paper is
useful if an ISE (ion) meter is not available.
•
Hanna HI 180 Magnetic Stirrer or equivalent with
Teflon coated stirring bars (HI 731320). (Note: iso-
late beakers from stirrer motor heat by placing insu-
lating material such as foam or cork between them).
•
Hanna HI 76404 Electrode Holder or equivalent.
•
Plastic beakers (HI 740036P) or other suitable mea-
surement vessel.
VI.
VI.
VI.
VI.
VI. Solutions Required
Solutions Required
Solutions Required
Solutions Required
Solutions Required
for Chloride Measurements
for Chloride Measurements
for Chloride Measurements
for Chloride Measurements
for Chloride Measurements
Select appropriate Hanna Instruments standard and ISA
from the list below:
0.1 M Sodium Chloride Standard, 500mL HI 4007-01
100 ppm Chloride standard, 500 mL
HI 4007-02
1000 ppm Chloride standard, 500 mL
HI 4007-03
ISA, 500 mL
HI 4000-00
Using volumetric pipettes and glassware make dilutions to
bracket the concentration of the samples. Standards with
concentrations
<
10
-3
M (35.5 ppm) should be prepared
daily.
Two mL of Hanna ISA for Halide electrodes (HI 4000-00)
should be added to 100 mL of sample or standard.
A user prepared acetate pH buffer may also be used to
adjust samples to approximately 4 pH. Add 10 mL per 100
mL sample or standard. Prepare 250 mL by dissolving
19.5 g ammonium acetate and 15.0 mL glacial acetic
acid in 200 mL deionized water and diluting to volume.
