®
Carbon Dioxide ISE Probe
Replacement Items
4
012-15719A
Connect the electrode to the sensor or measuring
device. Remove the cover from the electrode body.
2. Prepare two standard solutions that differ in
concentration by a factor of ten and bracket the
expected sample concentration range. For example,
if your expected sample concentration is 50 mg/L
Carbon Dioxide, you should use a 10 mg/L low
Standard Carbon Dioxide Solution and a 100 mg/L
high Standard Solution. Standards can be prepared
in any concentration unit to suit the particular analy
-
sis requirement.
•
NOTE: All standard solutions should be at the same
temperature as the sample.
Measurement:
If using a measuring device with 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 1 mL of ISA. Stir thoroughly. Check the
pH value of the solution.
2. Rinse electrode with Dl water, blot dry and place in
the beaker. Wait for a stable reading, and then
adjust the software or the measuring device to
display the value of the standard. Refer to the soft
-
ware 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 1 mL of ISA and stir. Check the
pH value of the solution.
4. Rinse electrode with Dl water, blot dry and place in
the second beaker. Wait for a stable reading, and
then adjust the software measuring device to display
the value of the second standard.
5. Measure 100 mL of the sample into a 150 mL
beaker. Add 1 mL of ISA. Stir thoroughly. Check the
pH value of the standard.
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 data
analysis tools in the software.
Electrode Storage
Short Term (over night):
Between measurements, keep the electrode tip
immersed in a 10 ppm standard without ISA. For
low-level measurements, keep the electrode in pH 7.00
buffer between measurements. For overnight storage,
the electrode tip should be immersed in pH 7.00 buffer
solution.
Long Term
For storage over one week, or if the electrode is stored
indefinitely, disassemble completely and rinse the Inter
-
nal Glass Electrode and Electrode Body with DI water.
Dry all the parts. Do not re-insert the Internal Glass Elec
-
trode into the Electrode Body. Instead, cover the tip of
the Internal Glass Electrode with the original boot. Store
all the parts separately in the original box. When reas
-
sembling, follow the procedure in the “Electrode Assem
-
bly” and “Checking Electrode Operation” seconds.
Life Span
The PS-3517 Carbon Dioxide ISE Probe is expected to
last more than three years before it needs to be
replaced.
Replacement Items
•
PS-3517 Carbon Dioxide ISE Probe
•
SC-3528 Carbon Dioxide ISE Solutions: 60-mL
Standard Solution, 30-mL Reference Fill Solution,
30-mL ISA Solution
Technical Support
For assistance with any PASCO product, contact
PASCO at:
Limited Warranty
For a description of the product warranty, see the PASCO catalog.
Address:
PASCO scientific
10101 Foothills Blvd.
Roseville, CA 95747-7100
Phone:
916-462-8384 (worldwide)
800-772-8700 (U.S)
Email:
Web:
www.pasco.com/support
