| Item: |
161-70 |
| Description: |
Iron
Count Test Kit |
Ferric iron concentration is determined in this procedure by the oxidation of iron to the ferric state at a pH value of 1 or less. The sample is then titrated with a standard EDTA solution in the presence of a salicyclic acid indicator at a pH of approximately 2.4. Hydrogen sulfide interferes with the complexing action of both the EDTA solution and the salicyclic acid. The hydrogen sulfide can be removed by boiling the sample with hydrochloric acid at a pH level below 1. Results are reported as ppm Fe+3 or as epm Fe+3.
Components:
#147-50 pH Paper, pHydrionｮ Dispenser, pH 2-10, 1-11
#153-10 Automatic Burette with Bottle and Bulb, 10 ml
#153-12 Graduated Cylinder, Glass, 100 ml x 1 ml
#153-26 Titration Dish, Polyethylene
#153-28 Stirring Rod, Polyethylene
#153-34 Pipette, Glass, 1 ml x 1/100 ml
Reagents:
#200-10-1 Hydrogen Peroxide, 3% Sol地, 2 oz (60 ml)
#205-00 Titration Sol地 (EDTA), 40 mg/L, 2 EPM, 16 oz (500 ml)
#205-12 Titration Sol地 (EDTA), 400 mg/L, 20 EPM, 16 oz (500 ml)
#270-00 *Nitric Acid, 3N, 8 oz (250 ml) UN2031
#275-00 *Hydrochloric Acid, 37%, Conc., 2 oz (60 ml) UN1789
#285-37 Iron Indicator Sol地, 2 oz (60 ml)
#285-40 Iron Buffer Sol地, 2 oz (60 ml)
Optional:
#168-01 Hot Plate, 115 Volt -or-
#168-01-1 Hot Plate, 240 Volt
|
