eutech-instruments ammonium epoxy User Manual

Ammonium Electrode 

 

Instruction Manual 

 

12

2. 

Perform Electrode Slope Check. 

 
3. 

If electrode(s) fail this procedure, see the section on 

. 

 
4. 

If the stability and the slope check out properly, but measurement problems persist, the 
standards may be of poor quality, the sample may contain interference or complexing 
agents, or the technique may be in error. See 

, and 

 sections 

below. 

 
5. 

Before  replacing  a  "faulty"  electrode,  review  the  instruction  manual  and  be  sure  to:                   
clean and rinse the electrode thoroughly prepare the electrode properly use proper filling 
solution, ISA, and standards measure correctly review 

 

 
The quality or results depends greatly upon the quality of the standards.  ALWAYS prepare fresh 
standard when problems arise.  It could save hours of frustrating troubleshooting!  Error may result 
from contamination of prepared standards, accuracy of dilution, quality of distilled water, or a 
mathematical error in calculating the standard concentrations. 
 

 
If the electrode works properly in standard but not in sample, look for possible interference, 
complexing agents, or substances which could affect response or physically damage the sensing 
electrode or the reference electrode. See 

 and 

. Try to 

determine the composition of the samples prior to testing to eliminate a problem before it starts. 
 

 
Check the method of analysis for compatibility with your sample. Direct measurement may not 
always be the method of choice.  Also be sure that the expected concentration of the ion of interest 
is within the electrode's limits of detection. 
If problems persist, review operational procedures and the instruction manual to be sure that proper 
technique has been followed. Call Eutech Instruments Pte Ltd. at (65) 6778-6876 and ask for the 
Customer Services Department to answer any questions.