title: Microwave-assisted extraction with water for fast extraction and simultaneous RP-HPLC determination of phenolic acids in radix Salviae Miltiorrhizae.
abstract: An optimized microwave-assisted extraction method using water (MAE-W) as the extractant and an efficient HPLC analysis method were first developed for the fast extraction and simultaneous determination of D(+)-(3,4-dihydroxyphenyl) lactic acid (Dla), salvianolic acid B (SaB), and lithospermic acid (La) in radix Salviae Miltiorrhizae. The key parameters of MAE-W were optimized. It was found that the degradation of SaB was inhibited when using the optimized MAE-W and the stable content of Dla, La, and SaB in danshen was obtained. Furthermore, compared to the conventional extraction methods, the proposed MAE-W is a more rapid method with higher yield and lower solvent consumption with a reproducibility (RSD <6%). In addition, using water as extractant is safe and helpful for environment protection, which could be referred to as green extraction. The separation and quantitative determination of the three compounds was carried out by a developed reverse-phase high-performance liquid chromatographic (RP-HPLC) method with UV detection. Highly efficient separation was obtained using gradient solvent system. The optimized HPLC analysis method was validated to have specificity, linearity, precision, and accuracy. The results indicated that MAE-W followed by HPLC-UV determination is an appropriate alternative to previously proposed method for quality control of radix Salviae Miltiorrhizae.
authors: College of Agronomy, Shandong Agricultural University, Taian, Shandong, China.
authors: Xinsheng
authors: X
authors: Fang
authors: Jianhua
authors: J
authors: Wang
authors: Hongying
authors: H
authors: Zhou
authors: Xingkai
authors: X
authors: Jiang
authors: Lixiang
authors: L
authors: Zhu
authors: Xin
authors: X
authors: Gao
mesh_terms: D001572:Benzofurans / Q000032:analysis / Q000302:isolation & purification*; D002851:Chromatography, High Pressure Liquid; D053630:Depsides / Q000032:analysis / Q000302:isolation & purification*; D007773:Lactates / Q000032:analysis / Q000302:isolation & purification*; D008872:Microwaves; D015394:Molecular Structure; D010316:Particle Size; D015203:Reproducibility of Results; D027561:Salvia miltiorrhiza / Q000737:chemistry*; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry*
chemical_list: D001572:Benzofurans; D053630:Depsides; D007773:Lactates; D014867:Water; C046833:lithospermic acid; C035055:3,4-dihydroxyphenyllactic acid; C076944:salvianolic acid B