Hanna Instruments HI 4003 Instruction Manual page 5

Cadmium ion selective electrode

Enlarged version

V. V. V. V. V. Equipment required:

Equipment required:

Hanna HI 5315 Double Junction Reference Electrode

with HI 7072 Fill Solution for use with HI 4003 half-

cell.

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 TFE

coated stirring bars (HI 731320). Note: isolate bea-

kers from stirrer 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

For Cadmium Measurements

0.1 M cadmium standard, (500 mL)

ISA, (500 mL)

For direct cadmium measurements- Using volumetric pi-

pettes and glassware, make dilutions of HI 4003-01 to

bracket the concentration of the samples. Note: 0.1M cad-

mium standard is equivalent to 11,200 ppm. Standards

with concentrations < 10

-3

M (112 ppm) should be pre-

pared daily. Store in tightly closed plastic bottle. To 100

parts standard or sample add 2 parts of ISA.

Please note: cadmium compounds are toxic by ingestion or

skin contact. Take appropriate precautions.

HI 4003-01

HI 4000-00

Hi 4103