Hanna-instruments HI 4004 Manual de usuario descargar pdf (Pagina 13)

Procedure:

Follow sections VIII and IX to prepare electrodes for mea-

surement.

1) Follow section VI to prepare standards/ solution. Stan-

dards should bracket and fall within the range of

interest. Standards and solutions should be at the

same temperature.

2) 2 mL of HI 4004-00 is added to 100 mL of both

samples and standards.

Add stir bar and mix before taking measurements.

3) Follow section VII; General Guidelines to optimize test

set-up.

4) During calibration it is best to start with lower concen-

tration samples first. Wait for a stable reading before

reading/ recording values. Permit longer equilibra-

tion times at these levels (3 or 4 minutes).

To prevent carry over and contamination of samples, rinse

sensors with deionized water and remove moisture with

absorbant tissue between samples.

Typical HI 4004 and HI 4104 Linearity

-80

-60

-40

-20

100

0123456

-Log of Molar Concentration

1 2 ... 8 9 10 11 12 13 14 15 16

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Hanna-instruments HI 4004 Manual de usuario Pagina 13