5
V.
V.
V.
V.
V. Equipment required:
Equipment required:
Equipment required:
Equipment required:
Equipment required:
•
The HI 4004 requires the Hanna HI 5315 Double
junction reference electrode with HI 7082 as external
electrolyte.
•
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
magnetic stirring bars (Note: Isolate beakers from stir-
rer motor heat by placing insulating 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
Standards for Calcium Measurements
0.1 M calcium standard,500 mL
HI 4004-01
Ionic Strength Adjuster
ISA, 500 mL
HI 4004-00
Conditioning and Storage Solution
Calcium storage solution, 500 mL
HI 4004-45
Using volumetric pipettes and glassware make dilutions to
bracket the concentration of the samples. Store samples in
plastic bottles. Standards with concentrations < 10
-3
M
should be prepared daily.
Two mL of Hanna ISA HI 4004-00 should be added to
100 mL sample or standard.
VII
VII
VII
VII
VII. General Guidelines
General Guidelines
General Guidelines
General Guidelines
General Guidelines
•
Ensure the o-ring is installed on modules before
screwing into the sensor handle or inner stem.
O-Ring
