Spectrophotometric formaldehyde-copper monitor

Details Spectrophotometric formaldehyde-copper monitor Spectrophotometric formaldehyde-copper monitor

1974-06-25

1976-04-20

Wolk, Morris O.

Chemistry: physical processes

Physical processes

Crystallization

23253R, 106 1, G01N 2128

Patent

active

039516024

ABSTRACT:
In an apparatus comprising a spectrophotometer, an inspection cell, and an electroless copper plating bath containing copper ions and formaldehyde for measuring the copper ion concentration of the bath spectrophotometrically, the improvement which comprises method and apparatus for spectrophotometrically measuring the formaldehyde concentration of the bath. The improved apparatus includes a source of reagent reactive with formaldehyde and a reaction vessel, useful for reacting the reagent with formaldehyde to produce a reaction product photoindicative of formaldehyde concentration.

REFERENCES:
patent: 3532519 (1970-10-01), Hirohata et al.
Chem. Abstr. Vol. 73: 90564w (1970).
Chem. Abstr., Vol. 67: 29019g (1967).
Chem. Abstr., Vol. 78: 31895k (1973).
Metalloberflaeche-Angew. Electrochem., Vol. 26(9), pp. 334-337, (1972).

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