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®

Chloride ISE Probe

Replacement Items

4

012-15721A

Connect the electrode to the sensor or measuring 

device.

2. Prepare two standard solutions that differ in 

concentration by a factor of ten and bracket the 

expected sample concentration range. Use the con

-

centration unit that is most appropriate. The 

standards are at the same temperature as 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 data 

analysis tools in the software.

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.

Replacement Items

SC-3525 Chloride ISE Solutions: 60 mL Standard 

Solution, 30 mL Reference Fill Solution, 30 mL ISA 

Solution

PS-3550 Chloride 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, 

in the United States and/or in other countries. All other brands, products, 

or service names are or may be trademarks or service marks of, and are 

used to identify, products or services of, their respective owners. For more 

information visit www.pasco.com/legal.

Product End of Life Disposal Instructions:

This electronic product is subject to disposal and recycling regulations that 

vary by country and region. It is your responsibility to recycle your 

electronic equipment per your local environmental laws and regulations to 

ensure that it will be recycled in a manner that protects human health and 

the environment. To find out where you can drop off your waste equipment 

for recycling, please contact your local waste recycle/disposal service, or 

the place where you purchased the product.

Address:

PASCO scientific

10101 Foothills Blvd.

Roseville, CA 95747-7100

Phone:

916-462-8384 (worldwide)

800-772-8700 (U.S)

Email:

[email protected]

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