Related Experiment Video
Updated: Jul 29, 2026

The Effect of Ultraviolet Radiation on the Chemical Bath Deposition of Bis(thiourea) Cadmium Chloride Crystals and the Subsequent CdS Obtention
Published on: August 30, 2018
Ion-pair chromatography of bis (sodium-sulfopropyl) disulfide brightener in acidic copper plating baths
Roger Palmans1, S Claes, L E Vanatta
1IMEC, Kapeldreef 75, B-3001 Leuven, Belgium. palmans@imec.be
Abstract:
Quantitative analysis of the brightener component bis (sodium-sulfopropyl) disulfide (SPS) in acidic copper plating baths poses a real challenge due to the complex chemical matrix containing large amounts of Cu(II) ion and sulfuric acid together with other organic additives and additive decomposition products. We developed a new ion-pair chromatography method to analyze micro-molar amounts of SPS directly in plating bath samples without the need for sample pre-treatment. Addition of tetra-N-methylammonium cation as ion-pairing agent to a methanol-sulfuric acid-water eluent increases the retention time of the anionic SPS2- on a C18 column sufficiently to separate this compound from Cu(II) ion and additive by-products.
Related Concept Videos
Precipitation of Ions
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
Preparation and Reactions of Sulfides
Electrophilic Aromatic Substitution: Sulfonation of Benzene
Precipitation and Co-precipitation
Electrodeposition
Electrodeposition can...
Extraction: Advanced Methods

![[(DPEPhos)(bcp)Cu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F59739.jpg&w=3840&q=50)