Tintometer Lovibond MD 100 Mode D'emploi page 14

Chemical Method
Bicinchoninate
Appendix
Interferences
Persistant Interferences
Hardness, Al and Fe produce lower test results.
Removeable Interferences
1. Cyanide, CN : Cyanide prevents full colour development.
-
Cyanide interference is eliminated as follows: Add 0.2 ml Formaldehyde to 10 ml
water sample and wait for a
reaction time of 4 minutes. (Cyanide is masked). After this perform the test
as described. Multiply the result by 1.02 to correct the sample dilution by
Formaldehyde.
2. Silver, Ag : If a turbidity remains and turns black, silver interference is likely. Add 10
+
drops of saturated Potassium chloride solution to 75 ml of
water sample and filter it through a fine filter. Use 10 ml of the filtered water sample
to perform test.
Method Validation
Limit of Detection
Limit of Quantification
End of Measuring Range
Sensitivity
Confidence Intervall
Standard Deviation
Variation Coefficient
Bibliography
S. Nakano, Y. Zasshi, 82 486 - 491 (1962) [Chemical Abstracts, 58 3390e (1963)]
Derived from
APHA Method 3500Cu
EN Method Reference Book 1.0
Copper PP / M153
0.05 mg/L
0.15 mg/L
5 mg/L
3.77 mg/L / Abs
0.064 mg/L
0.027 mg/L
1.07 %
EN
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