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Amperometric determination of hydrogen peroxide in pickling baths for copper and copper alloys by flow injection analysis

✍ Scribed by Hans Lundbäck

Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
503 KB
Volume
145
Category
Article
ISSN
0003-2670

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✦ Synopsis

The hydrogen peroxide is oxidized at + 1.5 V vs. SCE at a glassy carbon electrode of the wall-jet type. The samples are diluted about 100 times in a dispersion coil before entering the amperometric detector. The calibration curve is linear from 10' to 1 M H&j,, when 5-rl samples are used. With 50-rl samples the detection limit decreases to 10% M H,O,. Neither metal ions (Cu'+, Zn2+ Ni*+, AP+) up to 0.5 M nor changes in the sulfuric acid concentration of the samples beiween 0.1 and 1 M interfere with the hydrogen peroxide determination. About 75 samples can be analyzed per hour.

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