Determination of RETEN in a Bath
Original Publication Date: 1986-Apr-01
Included in the Prior Art Database: 2005-Mar-08
The RETEN* concentration is photometrically determined from the turbidity produced in the reaction of RETEN with a reagent, such as laurylsulphate, in an aqueous sulphuric acid solution. RETEN, a water-soluble copolymer of acrylamide and beta-methacryloxyethyltrimethylammonium-methylsulphate, is used for conditioning non-conductive surfaces for activation prior to electroless plating. For determining the RETEN concentration of the bath, into which the samples to be plated are immersed, a sample from bath 1 and simultaneously a sample from reagent container 2 are pumped by means of pump 3 through a mixer 4, where the reaction takes place, and through the flow cell of photometer 5.