title: [Quantitative model for patchouli alcohol in Pogostemon cablin by near-infrared spectroscopy].
abstract: OBJECTIVE
  To establish a near-infrared spectroscopy quantitative model for rapid determination of the patchouli alcohol content in Pogostemon cablin.
  
  
  METHODS
  The gas chromatography was adopted for determining the content of patchouli alcohol content in 102 batches of P. cablin samples. Their near-infrared spectrograms were collected and preprocessed by standard normal variate and the first derivative of Savitsky-Golay. The quantitative model of patchouli alcohol content was established by the partial least squares regression analysis.
  
  
  RESULTS
  According to the correction model established in this study, the root-mean-square error of calibration, the root-mean-square error of prediction and the root-mean-square error of cross-validation of the calibration model for Patchouli alcohol were 0.991 10, 0.012 9, 0.012 8 and 0.033 15, respectively.
  
  
  CONCLUSIONS
  The near-infrared spectroscopy quantitative model established in this study is stable, accurate and reliable for the rapid determination of the content of patchouli alcohol in P. cablin.
authors.affiliation: School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou 510006, China. caijialiang@foxmail.com
authors.forename: Jialiang
authors.initials: J
authors.lastname: Cai
authors.forename: Nianxin
authors.initials: N
authors.lastname: Guo
authors.forename: Jieyan
authors.initials: J
authors.lastname: Huang
authors.forename: Leilei
authors.initials: L
authors.lastname: Li
authors.forename: Shengguo
authors.initials: S
authors.lastname: Ji
mesh_terms: D002849:Chromatography, Gas / Q000379:methods*; D019686:Lamiaceae / Q000737:chemistry*; D012717:Sesquiterpenes / Q000032:analysis*; D019265:Spectroscopy, Near-Infrared / Q000379:methods*
chemical_list: D012717:Sesquiterpenes; C052983:patchouli alcohol