MSDS (Material Safety Data Sheet)
EM Quant® Copper Test, Catalog No. 10003Test strips and reagent for the detection and semi-quantitative determination of Copper ions GeneralThe Copper Test has many uses. It is suitable, for instance, for monitoring and testing swimming pool water, drinking water (when copper pipework has been installed, rendering higher concentrations more likely,) sewage, electroplating solutions, and copper etching baths used in the manufacture of printing plates and printed circuits. Copper contamination of nickel-plating solutions can also be detected. Principle of the MethodThe test for copper is based on a reaction in which copper(I) ions combine with 2,2'-biquinoline (cuproine) in an alcoholic-aqueous solution to form a purple-red complex. Copper(II) ions must be reduced prior to the color reaction. A combination of reducing agents in the reaction zone reduces the ions within a few seconds. The paper contains a special buffer mixture which ensures that the determination is independent of the pH between pH 2 and pH 7. Graduation0 - 10 - 30 - 100 - 300mg/l (ppm) Cu1+/2+ Directions
NotesThe pH of the sample solution should be between 2 and 6. Surface DeterminationsMoisten the reaction zone with water and press onto the surface to be tested (e.g. a coin) for approximately 10-30 seconds. The reaction zone becomes purple in the presence of as little as 0.5µg of copper. Influence of AnionsThere is no interference at less than:
In the presence of more than 500mg/l CrO42–, IO4–, S2O42– or more than 250mg/l I- the copper ion concentrations found are less than actually present. The reagent paper becomes brown to green-black in the presence of more than 500mg/l IO3– or IO4–. Influence of CationsThere is no interference at less than:
Molybdenum blue interferes by its blue intrinsic color. This is eliminated by the addition of potassium permanganate crystals to the solution until the dark red color persists. Subsequently decolorize with hydroxylammonium chloride and determine the copper ion concentration with the test strip. Elimination of InterferenceEliminate interfering anions in the usual way by fuming off with concentrated sulfuric acid. Standard (1000mg/l)Copper standard solution, 500ml. |
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