Hanna Instruments HI 4013 User Manual
Page 13
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 mL of HI 4013-00 is added to 100 mL of both
samples and standards. OR
•
10 mL of ISISA are added to 50 mL both samples
or standards.
Add stir bar and mix before taking measurements.
2) Follow section VII; General Guidelines to optimize test
set-up.
3) 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.
T y p ic a l HI 4 0 1 3 a n d HI 4 1 1 3 L in e a r ity
0
50
100
150
200
250
300
0
1
2
3
4
5
6
7
-L o g o f M o la r C o n c e n tr a tio n
mV