Hanna-instruments HI 4101 Manuale Utente Scaricare il pdf (Pagina 15)

Typical calibration curve for HI 4101 Ammonia ISE

• Standards should bracket the measurement range of

interest and differ from each other by a factor of 10 in

the linear regions.

• Standards and solutions should be at the same tem-

perature. 2 mL of ISA is added to each 100 mL of

sample and standard. A color change should occur to

indicate the ISA has been added.

• Protect these solutions from loss of dissolved gas by

covering and using promptly.

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.

5) To prevent carry over and contamination of samples,

rinse sensors with deionized water and blot dry be-

tween samples.

6) Between measurements suspend sensor tip in a small

sample of NH

Conditioning solution;

HI 4001-45. Rinse body with deionized water and

blot dry before placing in next sample.

Typical Linearity for HI 4101 Electrode

-300

-250

-200

-150

-100

-50

0123456

-Log of [M

]

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 39 40

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Hanna-instruments HI 4101 Manuale Utente Pagina 15