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Table 3 Heavy metal contents in fresh tea leaves (FTL)

From: Determination of heavy metals in the soils of tea plantations and in fresh and processed tea leaves: an evaluation of six digestion methods

Sample ID

Mean ± SD (µg/g)

Cd

Pb

As

Se

FTL-1

0.07 ± 0.0001

0.05 ± 0.0005

1.84 ± 0.0001

BDL

FTL-2

0.03 ± 0.0008

0.31 ± 0.0001

1.66 ± 0.0062

0.90 ± 0.0024

FTL-3

0.08 ± 0.0064

0.40 ± 0.0003

BDL

BDL

FTL-4

0.13 ± 0.0038

1.14 ± 0.0005

2.06 ± 0.0056

1.28 ± 0.0004

FTL-5

0.07 ± 0.0040

0.05 ± 0.0003

1.17 ± 0.0013

0.78 ± 0.0015

FTL-6

0.09 ± 0.0015

0.09 ± 0.0001

1.45 ± 0.0054

1.31 ± 0.0098

FTL-7

0.11 ± 0.0056

0.22 ± 0.0006

1.48 ± 0.0237

BDL

FTL-8

0.06 ± 0.0025

0.46 ± 0.0004

1.81 ± 0.0064

0.47 ± 0.0004

FTL-9

0.13 ± 0.0041

BDL

0.44 ± 0.0022

0.77 ± 0.0002

FTL-10

0.12 ± 0.0036

BDL

0.19 ± 0.0001

0.85 ± 0.0075

Mean

0.089

0.272

1.210

0.636

  1. The limit of detection were 0.0052, 0.0026, 0.0046, 0.01 and 0.0084 µg/g for Cd, Cr, Pb, As and Se, respectively. The data (µg/g) shown in Table is reported on dry weight basis
  2. n = 3 (n no. of analyses), SD standard deviation, BDL below detection limit