Sodium 2 bromoethanesulfonate

Sulfuric acid 95–98%, acetone, sodium (meta) periodate, ethylene glycol ≥99%, N,N-dimethyl-1,3-propanediamine 99%, sodium borohydride, sodium acetate ≥99% and sodium 2-bromoethanesulfonate 98% (SBES) and hydroxylamine hydrochloride ≥99.9995% were purchased from Sigma-Aldrich (Stockholm, Sweden). Acetic anhydride ≥99.0% was purchased from Fluka Chemika (distributed by Fischer Scientific, Gothenburg, Sweden). Glacial acetic acid 99.79% was purchased from Fisher Scientific (Gothenburg, Sweden). Dimethyl sulfoxide ≥99% (DMSO) was purchased from Merck (Stockholm, Sweden). Hydrochloric acid (HCl) was purchased from J.T. Baker (distributed via VWR, Stockholm, Sweden). Absolute ethanol and sodium hydroxide (NaOH) 99.3% were purchased from VWR Chemicals (Stockholm, Sweden). Microfibrillated cellulose paste (Exilva P01-V) with a solid content of 10.1% (w/w) was a kind gift from Borregaard (Sarpsburg, Norway). Exilva P01-V has a viscosity (2% in H₂O) of 23,000 mPas and a conductivity (2% in H₂O) of 23 μS/cm. Deionized (DI) water was used throughout the study. All chemicals were used without further purification.