Influence of sodium dodecyl sulfate coating on adsorption of methylene blue by biochar from aqueous solution.

Biochar is regarded as a promising new class of materials due to its multifunctional character and the possibility of effectively coupling different properties. With increasing introduction into the environment, environmental chemicals such as surfactants will load onto the released biochar and change its physicochemical characteristics and adsorption behavior toward pollutants. In this study, sodium dodecyl sulfate (SDS), as one type of anionic surfactant, was coated onto biochar with different loading amounts.

Evaluation of quality of Radix Puerariae herbal medicine by isoflavonoids.

Objectives: A high-performance liquid chromatography (HPLC) method was developed to examine five isoflavonoids present in Chinese herbal medicinal products containing Radix Puerariae.

Methods: Five isoflavonids, puerarin, daidzin, genistin, daidzein and genistein, were measured by HPLC. The HPLC system was equipped with an ODS-AM-303 column (250 mm x 4.