LaMotte SMART Spectro Spectrophotometer - Manual (Page 122)

COPPER–LOW RANGE
BICINCHONINIC ACID METHOD • CODE 3640-SC
QUANTITY CONTENTS CODE
50 * Copper Tablets T-3808-H
*WARNING: Reagents marked with a * are considered to be potential health hazards. To view
or print a Material Safety Data Sheet (MSDS) for these reagents see MSDS CD or
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 fittings. This
corrosion results in the addition of copper into the water supply.
APPLICATION: Drinking, surface, and saline waters; domestic and industrial
wastes.
RANGE: 0.00–3.50 ppm Copper
METHOD: Copper ions form a purple complex with bicinchoninic acid
around pH 6-7, 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% HCl 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: High concentrations of oxidizing agents, calcium, and
magnesium interfere. Silver can also interfere.
SMART SPECTRO TEST PROCEDURES 05.04 Copper–LR 1/2