eutech-instruments carbon dioxide gas 사용자 설명서
Instruction Manual
Carbon Dioxide Electrode
16
Standards
The quality of results depends greatly upon the quality of the standards. ALWAYS prepare fresh
standards 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 concentrations.
The best method for preparation of standards is by serial dilution. This means that an initial
standard is diluted, using volumetric glassware, to prepare a second standard solution. The second
is similarly diluted to prepare a third standard, and so on, until the desired range of standards has
been prepared.
standards 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 concentrations.
The best method for preparation of standards is by serial dilution. This means that an initial
standard is diluted, using volumetric glassware, to prepare a second standard solution. The second
is similarly diluted to prepare a third standard, and so on, until the desired range of standards has
been prepared.
Sample
If the electrode works properly in standards but not in sample, look for possible interferences,
complexing agents, or substances which could affect response or physically damage the sensing
electrode or the reference electrode. If possible, determine the composition of the samples and
check for problems. See
complexing agents, or substances which could affect response or physically damage the sensing
electrode or the reference electrode. If possible, determine the composition of the samples and
check for problems. See
Sample Requirements
and
Interferences
.
Technique
Be sure that the electrode's limit of detection has not been exceeded. Be sure that the analysis
method is clearly understood and is compatible with the sample.
Refer to the instruction manual again. Reread sections on
method is clearly understood and is compatible with the sample.
Refer to the instruction manual again. Reread sections on
GENERAL PREPARATION
and
ELECTRODE CHARACTERISTICS.
If trouble still persists, call Eutech Instruments Pte Ltd. at (65) 6778-6876 and ask for the Customer
Services Department.