“…They include diazotisation, electrometric, bromometric, neutralisation and non-aqueous titration methods. Sulphonamides can also be determined by precipitating with metallic ions, example silver, mercuric or copper ions and completing the determination gravimetrically or volumetrically in aqueous or non-aqueous media, see, for example, Lapiere (1946Lapiere ( , 1947Lapiere ( , 1948.…”