Rapid Determination of Catechin Content in Black Tea by Fluorescence Spectroscopy

Table 2

Catechin contents in tea infusion from different regions by fluorescence method and HPLC.

Name	Province	Tea region	Catechin (mg/kg)
			Fluorescence	HPLC
Gongfu	Sichuan	Southwest	70.62	70.28 ± 1.96
Fengpai	Yunnan	Southwest	71.88	77.98 ± 0.50
Zunyihong	Guizhou	Southwest	67.00	68.38 ± 12.32
Jinjunmei	Guangxi	South China	30.54	31.60 ± 1.68
Yingde	Guangdong	South China	49.84	51.62 ± 5.49
Bama	Fujian	South China	44.06	46.22 ± 1.49
Jiuquhongmei	Zhejiang	Southern Yangtze	26.98	25.84 ± 0.88
Manxianghong	Hunan	Southern Yangtze	38.56	39.34 ± 1.01
Jiyelichuan	Hubei	Southern Yangtze	9.60	9.87 ± 0.11
Qimen Gongfu	Anhui	Southern Yangtze	54.06	53.96 ± 6.65
Qianhong	Jiangsu	Southern Yangtze	30.80	30.87 ± 1.75
Wuyuan	Jiangxi	Southern Yangtze	33.96	35.38 ± 5.97

Name is the brand of black tea, province is the area of black tea, and tea region is the area where tea leaves come from. Data were calculated based on three-replicate experiments and shown by mean value ± standard deviation.