Component analysis of crude and sweated Dipsaci Radix based on HPLC-ESI-MS Determination of loganic acid, chiratin, and loganin in Dipsaci Radix Rapid identification of crude and sweated Dipsaci Radix based on near-infrared spectroscopy combined with principal component analysis-Mahalanobis distance Determination of organochlorine pesticide residues in Dipsaci Radix Determination of organochlorine pesticide residues in Dipsaci Radix