Table 2.

NIRS analysis of the partial genuine medicinal materials in China.

Drug	Component	Wavelength range (cm−1)	Pretreatment method	Reference
Taxol injection	Taxol	9000–4400	Minus a straight line	77
Acanthopanax Senticosus Injection	Chlorogenic acid	8927–8735, 6800–5400, 4700–4300	First derivative+vector normalization	78
Syringin
Eleutheroside E
Acanthopanax Senticosus powder	Syringin	4601–4246	First derivative+multiple scattering correction	79
Cordyceps Sinensis (Berk) Sacc	Glu	10000–3970	First derivative+Savitzky–Golay	80
Arg	9420–3950
Asp	9050–3855
Total amino	8500–3800
Eucommiae Unloads	Pinoresinol diglucoside	7502–4597	First derivative+minus a straight line	81
Yiqing Granule	Baicalin	6749–4987	First derivative+multiple scattering correction	82
Semen Thlaspi	Sinigrin	7502–5446	Maximum and minimum normalization	83
Phellodendron Chinese Schneid	Berberine	8000–4000	Second derivative	84
Radix Scutellariae	Total Flavonoids	8015–5446	Maximum and minimum normalization	85
Baicalin	6105–4242	First derivative
Forsythiae Suspensa	Phillyrin	9002–4103	First derivative	86
Ophiopogon Japonicus	Polysaccharides	4000–4900, 5100–6900, 7050–10000	First derivative+Savitzky–Golay+multiple scattering correction	87
Ligusticum Chuanxiong Hort	Ferulic acid	7501–6799, 4424–4246	First derivative	88
Rehmannia Glutinosa Libosch	Catalpol	6102–4597	First derivative+multiple scattering correction	89
Dioscorea Zingiberensis C.H.	Extracts by ethanol	5476–7466	First derivative+standard normalization variate	90
Rhizoma Dioscoreae	Polysaccharide	7513–4597	First derivative+vector normalization	91
Rhizoma Dioscoreae	Extracts by water	8717–5446, 4613–4242	First derivative+vector normalization	92
Extracts by ethanol
Bear Gall powder extracts	Ursodesoxycholic acid	4500–8500	First derivative+Savitzky–Golay	10
Chenodeoxycholic acid
Ursolic acid