Sulfur dioxide content in traditional Chinese medicines

AN-T-221 SET titration of HPLC mobile phases Automated timesaving pH adjustment of semi-aqueous media Summary High pressure liquid chromatography (HPLC) requires the use of a mobile phase – mostly consisting of semi-aqueous media. These kinds of media are challenging to…

AN-T-203 Acidity in volatile solvents and chemical intermediates Objective and reliable determination according to ASTM D1613 Summary The presence of acidic components in volatile solvents is due to contamination of the solvents, or through their decomposition during storage, distribution, or…

AN-T-055 Determination of Lauryl Sulfate Fast and reliable determination by turbidimetric titration Summary Due to its price and wide availability, the anionic surfactant sodium lauryl sulfate (SLS; SDS) can be found in many detergents as an active ingredient e.g., in…

AN-T-086 Vitamin C in orange juice Photometric titration according to ISO 6557-2 Summary Vitamin C, also known as ascorbic acid or L-ascorbic acid, is an essential nutrient involved in the repair of tissues and the enzymatic production of certain neurotransmitters.…