LaMotte SMART Spectro Spectrophotometer - Manual (Page 141)

APPLICATION: Drinking, surface, and saline waters; domestic and
industrial wastes.
RANGE: 0.00–4.00 Copper
MDL: 0.20 ppm
METHOD: Cupric 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% 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: High concentrations of oxidizing agents, calcium, and
magnesium interfere. Silver can also interfere.
COPPER, UDV SMART Spectro Test Procedures 2.11
Test P
rocedures