Final Report Report No.: 1 Program No.: WAT-CH-0001 Program ...

Report No.: 1
Sulphate
Method
Number of
results
% of total Median Sat. (%)
Ion Chromatography 6 22.2% 271.40 100%
Turbidimetry 17 63.0% 266.40 65%
other 4 14.8% 266.50 75%
Fluoride
Method
Number of
results
% of total Median Sat. (%)
Ion Chromatography 6 25.0% 0.24 ---
Spectrophotometry 14 58.3% 0.48 ---
other 4 16.7% 0.38 ---
Comments: in case of using ion chromatography method, the analysis should be done by using
a suitable effluent and removal of interferences.
Conductivity
Method
Number of
results
% of total Median Sat. (%)
Conductivity Meter 24 88.9% 1399.50 88%
other 3 11.1% 1408.00 67%
Total Dissolved Solids
Method
Number of
results
% of total Median Sat. (%)
Drying @ 180°C 12 46.2% 945.50 100%
Calculation 4 15.4% 903.50 100%
other 10 38.5% 777.00 90%
7-3- Overall performance
Samples have been collected and prepared according to standard methods for the examination
of water and wastewater.
Assigned values for each parameter have been determined form the participants results in this
program and statistical calculations.
In case of fluoride, due to the variations in the results the evaluation of participants performance
is not possible. Since the analysis of fluoride is a very sensitive procedure and diferrent
parameters such as sample and standards temperature can affect the measurement process so
it is expected to improve the test methods results by carefully take the above mentioned
cautions into consideration.
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