®
Ammonium ISE Probe
Replacement Items
4
012-15718A
Ammonium, you should use a 1 mg/L low Standard
Solution and a 10 mg/L high Standard Solution.
•
NOTE: Temperature compensation is not typical of
ISE measurements - for best performance, try to
ensure that the standards are within 5 to 10°C of the
sample.
Measurement:
If using a measuring devicewith direct concentration
reading capability (see the software on-line help or the
measuring device’s instruction manual for specific
information):
1. Place 100 mL of the low standard into a 150 mL
beaker. Add 2 mL of ISA. Stir thoroughly.
2. Rinse electrode with Dl water, blot dry and place in
the beaker. Wait for a stable reading, and then
adjust the measuring device to display the value of
the standard. Refer to the software on-line help or
the measuring device’s instruction manual for the
adjustment procedure.
3. Measure 100 mL of the high standard into a second
150 mL beaker. Add 2 mL of ISA and stir.
4. Rinse electrode with Dl water, blot dry and place in
the second beaker. Wait for a stable reading, and
then adjust the measuring device to display the
value of the second standard.
5. Pipette 100 mL of sample into a 150 mL beaker. Add
2 mL of ISA. Stir thoroughly.
6. Rinse electrode with Dl water, blot dry and place in
the sample beaker. Wait for a stable reading and the
sample concentration will be displayed on the mea
-
suring device.
7. Determine the sample concentration using the
calibration curve prepared in Step 6 above.
Electrode Storage
Short Term (over night or the weekend):
Rinse the electrode thoroughly with Dl water and place
the tip in a diluted standard solution between
measurements. Slide the FastFil sleeve upward to close
the fill hole.
Refill the reference before putting the electrode back into
service
Long Term
Refill the electrode with Reference Filling Solution and
close the fill hole. Remove the sensing element and
store in the glass vial or replace the cap to protect the
sensing element.
Follow procedures in "Electrode Preparation" and
"Checking Electrode Operation" before using the
electrode again.
Electrode Cleaning
Cleaning should only be attempted if troubleshooting
methods fail. The PVC membrane is a delicate sensor
and should not be brushed or otherwise contacted. It
can be rinsed vigorously under warm water to remove
debris. Soaking for 10-15 minutes in DI water might be
useful in extracting other contaminants.
Recondition the electrode by soaking in a low standard
solution immediately after any cleaning method.
Replacement Items
•
SC-3523 Ammonium ISE Solutions: 60 mL Standard
Solution, 30 mL Reference Fill Solution, 30 mL ISA
Solution
•
PS-3548 Ammonium ISE Replacement Module
Technical Support
For assistance with any PASCO product, contact
PASCO at:
Limited Warranty
For a description of the product warranty, see the PASCO catalog.
Copyright
This PASCO scientific instruction sheet is copyrighted with all rights
reserved. Permission is granted to non-profit educational institutions for
reproduction of any part of this manual, providing the reproductions are
used only in their laboratories and classrooms, and are not sold for profit.
Reproduction under any other circumstances, without the written consent
of PASCO scientific, is prohibited. Rev: 10/17
Trademarks
PASCO, PASCO scientific, PASCO Capstone, PASPORT and
SPARKvue are trademarks or registered trademarks of PASCO scientific,
Address:
PASCO scientific
10101 Foothills Blvd.
Roseville, CA 95747-7100
Phone:
916-462-8384 (worldwide)
800-772-8700 (U.S)
Email:
