Determination of Hydroquinone in Tin Electroplating Solution with Methanesulfonae by Ultra-High Performance Liquid Chromatography

The sample (25.00 mL) was diluted to 100 mL with deionized water, and the solution was filtered with a 0.2 μm aqueous filter to prepare the sample solution. BEH Amide chromatographic column (3.0 mm×150 mm, 1.7 μm) was used for seperation, with 0.010 mol·L^-1 ammonium acetate acetonitrile solution-0.010 mol·L^-1 ammonium acetate aqueous solution (volume ratio of 70:30) as the mobile phase at the flow rate of 0.40 mL·min^-1. Evaporatire light scattering detector was used. The interference tests showed that the determination of hydroquinone was not affected by other coexisting components in the tin electroplating solution with methanesulfonate. When the mass concentration of hydroquinone was in range of 10.0-100.0 mg·L^-1, the logarithm of its mass concentration was linear to the logarithm of its corresponding peak area, with detection limit (3S/N) of 2.21 mg·L^-1. The proposed method was applied to the determination of hydroquinone in actual samples, giving relative standard deviations (n=11) were in the range of 0.79%-1.2%, and the values of recovery obtained by standard addition method ranged from 99.2% to 102%.The synthetic sample of tin electroplating solution with methanesulfonate was prepared according to its formula and determined by the proposed method.The results were consistent with the theoretical values.