LaMotte SMART3 Colorimeter - Manual (Page 155)

COPPER
CUPRIZONE METHOD • CODE 4023
QUANTITY CONTENTS CODE
15 mL Copper A P-6367-E
15 mL *Copper B *P-6368-E
*WARNING: Reagents marked with an * are considered to be potential health
hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents
go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail,
phone or fax.
The copper content of drinking water generally falls below 0.03 parts per million,
but copper levels as high as 1.0 part per million will give water a bitter taste.
Waters testing as high as 1.0 part per million copper have probably been treated
with a copper compound, like those used in the control of algae, or have become
contaminated from untreated industrial wastes. The addition of copper sulfate to
lakes causes an increase in the copper content of the sediments. Acid waters and
those high in free carbon dioxide may cause the corrosion or “eating away” of
copper, brass and bronze pipes and fi ttings. This corrosion results in the addition
of copper to the water supply.
APPLICATION: Drinking, surface, and domestic waters. Pools and
spas.
RANGE: 0.00–2.50 ppm Copper
MDL: 0.03 ppm
METHOD: Copper ions form a blue complex with cuprizone, in
a 1 to 2 ratio, at a pH of about 8, in proportion to the
concentration of copper in the sample.
SAMPLE HANDLING &
PRESERVATION:
Copper has a tendency to be adsorbed to the surface
of the sample container. Samples should be analyzed
as soon as possible after collection. If storage is
necessary, 0.5 mL of 20% hydrochloric acid per 100
mL of sample will prevent “plating out”. However, a
correction must be made to bring the reaction into the
optimum pH range.
INTERFERENCES: Hg +1 at 1 ppm. Cr +3 , Co +2 , and silicate at 10 ppm.
As +3 , Bi +3 , Ca +2 , Ce +3 , Ce +4 , Hg +2 , Fe +2 , Mn +2 , Ni +2 and
ascorbate at 100 ppm.
Many other metal cations and inorganic anions at 1000
ppm. EDTA at all concentrations.
SMART3 Test Procedures 11.10 COPPER, Cuprizone
Test P
rocedures