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Table 2 Evaluation of the similarity of 20 Pu-erh green tea samples using Jingmai Pu-erh green tea common model of chromatographic fingerprints

From: Comparative analysis of volatiles difference of Yunnan sun-dried Pu-erh green tea from different tea mountains: Jingmai and Wuliang mountain by chemical fingerprint similarity combined with principal component analysis and cluster analysis

Sample no.

Correlation coefficient

Congruence coefficient (R)

Median

Average

Median

Average

J1

0.7959

0.8705

0.8391

0.8985

J2

0.9059

0.9067

0.9237

0.9241

J3

0.7500

0.8086

0.8030

0.8504

J4

0.8181

0.8263

0.8606

0.8694

J5

0.8853

0.8708

0.9009

0.8878

J6

0.7766

0.7968

0.8187

0.8354

J7

0.7547

0.8009

0.7821

0.8435

J8

0.8290

0.8853

0.8617

0.9066

I9

0.8158

0.8710

0.8428

0.8869

J10

0.9575

0.9207

0.9649

0.9349

W1

0.2594

0.3101

0.4008

0.4469

W2

0.2853

0.3898

0.4139

0.5036

W3

0.2314

0.3259

0.3785

0.4598

W4

0.3382

0.3564

0.4799

0.4998

W5

0.2766

0.3615

0.3907

0.4654

W6

0.2620

0.2875

0.3913

0.4169

W7

0.2403

0.2565

0.3835

0.4020

W8

0.2314

0.2528

0.3681

0.3906

W9

0.2146

0.2619

0.3366

0.3804

W10

0.2570

0.2743

0.3902

0.4092

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BMC Chemistry

ISSN: 2661-801X

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