Hanna-instruments HI 83207-01 Manual do Utilizador descarregar pdf (Página 32)

• Press Timer and the display will show the countdown prior to zeroing the blank or, alternatively, wait

for two minutes and press Zero. The display will show “-0.0-” when the meter is zeroed and ready for

measurement.

• Remove the cuvette.

• Insert the other cuvette (# 2) with the reacted sample into the

instrument.

• Press Read to start reading. The instrument displays the results in mg/L of fluoride.

Note: For wastewater or seawater samples, before performing measurements, distillation is required.

For most accurate results, use two graduated pipettes to deliver exactly 8 mL of distilled water and

8 mL of sample.

Fluoride

INTERFERENCES

Interferences may be caused by:

Alkalinity (as CaCO

) above 5000 mg/L

Aluminum above 0.1 mg/L

Iron, ferric above 10 mg/L

Chloride above 700 mg/L

Phosphate, ortho above 16 mg/L

Sodium hexametaphosphate above 1.0 mg/L

Sulfate above 200 mg/L

Highly colored and turbid samples may require distillation

Highly alkaline samples can be neutralized with nitric acid.

# 2

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 67 68

Sem comentários

Hanna-instruments HI 83207-01 Manual do Utilizador Página 32