https://www.db-thueringen.de/receive/dbt_mods_00067399https://www.db-thueringen.de/servlets/MCRFileNodeServlet/dbt_derivate_00068922/1572-8838_55_2025_977%20-%20989.pdfhttps://www.db-thueringen.de/rsc/thumbnail/dbt_mods_00067399.png article 55 4 977 989 text continuingjournal Journal of applied electrochemistry journal 1971 Dordrecht [u.a.] Springer Science + Business Media B.V 2020-05-28 en 540 1572-8838 http://uri.gbv.de/document/gvk:ppn:302466037 1491094-9 his Host institution text article Investigation of the electrochemical conversion of brighteners during nickel electrodeposition, Part 1: chemical analysis by mass spectrometry Schmidt, Udo aut Author 1204931372 Schmidt Udo Wilke, Marcus aut Author Wilke Marcus Leimbach, Martin aut Author 1205375953 0000-0002-9548-7653 Leimbach Martin Bund, Andreas aut Author 12967477X 0000-0001-9837-2408 Bund Andreas 2024-11-07 Dordrecht [u.a.] Springer Science + Business Media B.V 2025-09-08 13 Seiten en 540 10.1007/s10800-024-02208-7 http://uri.gbv.de/document/gvk:ppn:1906740186 his Host institution Analysis Brightener HPLC–MS Leveler Nickel electrodeposition Results of an investigation of the action of various pyridinic and acetylenic brighteners during the electrodeposition of nickel are reported here. The focus was on the qualitative and quantitative analysis of the individual compounds 1-(3-sulphopropyl)-pyridinium betaine (PPS) and sulphopropylated 2-butyne-1,4-diol (HBOPS) and their reaction products. High performance liquid chromatography (HPLC) with a mass spectrometric detector (HPLC-MS) and a diode array detector in the UV range (HPLC-UV) were used to examine the various additives and the cathodic reaction products. PPS is almost completely hydrogenated to the piperidine compound (3-piperidin-1-yl-propane-1-sulphonate, PIPS) at the catalytically active nickel electrode; as intermediate products, only tetrahydrogenated pyridine (THPPS) compounds occur in the solution, in low concentrations. The entire hydrogenation chain takes place on the surface; partially hydrogenated products are either not desorbed at all or only desorbed in small quantities. Further by-products are dimers and after ring cleavage a pentylamine derivative {3-(pentylamino)-1-propanesulphonic acid, PAPS}. Via the olefinic intermediate stage, the butynediol compound (HBOPS) reacts to become sulphopropylated butanediol. After elimination of water, this forms butanoxy-propanesulphonate in a further hydrogenation step. dbt_mods_00067399