Test Procedures
APPLICATION:
Drinking and surface waters; domestic and industrial
wastewaters.
RANGE:
0.00–3.00 ppm Zinc
MDL:
0.025 ppm
METHOD:
Zinc forms a blue colored complex with Zincon in a solution
buff ered at pH 9.0. Other heavy metals are complexed by
cyanide and the zinc cyanide complex is released by the
addition of formaldehyde before the other metal cyanide
complexes are destroyed. Sodium ascorbate is added to
reduce the interference of manganese.
SAMPLE HANDLING &
PRESERVATION:
Sample should be analyzed within 6 hours after collection.
The addition of hydrochloric acid will help preserve the metal
ion content, however the acid should be neutralized before
analysis.
INTERFERENCES:
The following ions interfere in concentrations
greater than those listed.
ION MG/L
ION
MG/L
Cd(II)
1
Cr(III)
10
Al (III)
5
Ni(II)
20
Mn (II)
5
Co (II)
30
Fe (III)
7
CrO
4
(II)
50
Fe (II)
9
ZINC
SMART Spectro 2 Test Procedures 07.05.16
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