1. © The Author(s) 2015. Published by Science and Education Publishing.
Table 3. Elemental concentrations of ten tea samples measured with ICP-OES combined with microwave digestion
(mg kg-1 d.w.)
Element
QZDT
KZDT
FZDT
LBDT
QMBT
QLDT
PET
XYGT
TGYT
WLT K
±97.21c
±27.10d
±96.67c
±108.17i
±134.54h
±60.17e
±65.06g
±85.42b
±56.86f
±85.04a Ca
±22.50g
±32.81h
±25.24g
+43.94e
±74.67a
±23.71f
±47.86d
±36.61b
±22.87c
±77.47d Mg
±36.30d
±23.44f
±22.72d
±26.41e
1519.3
3±20.21c
±23.03b
±28.75b
±70.81a
±19.92b
±31.53c Sr
22.27
±0.79e
37.84
±0.85f
23.12
±0.66e
14.12
±0.85c
6.16
±0.40a
14.48
±1.83c
14.03
±0.77c
4.27
±0.22a
6.55
±0.93b
18.88
±2.64d B
11.24
±0.87b
16.66
13.08
±0.68d
12.55
±1.07c
10.99
±0.74b
9.81
±1.77b
10.25
±0.71b
6.80
±0.45a
7.56
±0.69a
10.49
±1.18b As
1.28
±0.19d
1.59
±0.12e
1.23
±0.12d
0.55
±0.04b
0.18
±0.17a
0.61
±0.09c
0.32
±0.04a
0.20
±0.16a
0.23
±0.13a
1.35
±0.30d Cd
0.13
±0.03c
0.27
±0.01e
0.231
±0.01d
0.04
±0.01a
0.03
0.10
±0.01b
0.09 ±0.01b
0.08
＜0.030*
0.05 Co
0.48
±0.08c
0.73
0.50
±0.02c
0.24
±0.02a
0.35
±0.08b
0.46 ±0.02c
0.47
±0.05c
0.21
0.34 Cu
14.43
±0.77b
16.6
±0.43c
22.18
±0.85d
15.16
±0.79b
17.59
±1.09d
15.36
±2.19b
23.23
±0.96d
16.35
±1.07b
6.60
±0.63a
7.80
±1.12a Fe
623.63
±4.39f
776.2
±18.34g
440.6
±11.37e
328.77
±18.20d
111.57
±10.14a
239.03
±21.89c
237.80
±8.47c
125.77
±8.74b
95.69
±8.72a
337.70
±15.59d Mo
±0.03a
0.06
±0.05b
±0.01c
＜0.0096*
0.01
0.02 Ni
4.19
±0.72b
8.80
±0.19e
5.66
±0.25c
4.15
±0.26b
6.63
±0.42d
4.67
±1.16b
8.25
±0.42e
6.14
±0.44c
±0.15a
1.76
±0.29a Pb
2.67
±0.55c
4.05
±0.08d
4.28
±0.26d
0.16
±0.06a
＜0.0050*
1.01
±0.15b
0.17
1.17
±0.10b
0.09
±0.12a
±0.14a Se
0.19
±0.10a
0.75
0.58
±0.28a
1.08
±0.86b
1.40
±0.12c
0.59
±0.08a
±0.07a
0.51±0.09a
＜0.0486* V
1.46
±0.27f
2.06
±0.03g
1.04
±0.24e
±0.18a
±0.06b
0.79
±0.04d
0.56
0.33
0.63
±0.06c Zn
25.69
31.58
±0.93d
31.29
±2.36d
33.09
±1.92e
40.34
±3.60f
23.54
±2.83b
27.60
±1.38c
28.60
±1.70c
16.88
±1.62a
18.46
±2.82a Li
0.41
±0.29b
0.15
0.16 ±0.02a
0.01 ±0.01a
Note：Columns with results with superscript letters indicate a significant difference at p≤0.05 level by Duncan’s multiple range test.
* Below the limit of quantification(LOQ, mg kg-1 ).
QZDT: Qingzhuan dark tea; KZDT: Kangzhuan dark tea;
FZDT: Fuzhuan dark tea; LBDT: Liubao dark tea; QMBT: Qimen black tea; QLDT: Qianliang dark tea; PET: Pu-erh tea;
XYGT: Xinyang green tea; TGYT: Tieguanyin tea; WLT: Wulong tea.
Mingjun Huang et al. Determination of Multiple Elemental Concentrations in Tea from China by Inductively Coupled
Plasma Optical Emission Spectrometry. Journal of Food and Nutrition Research, 2016, Vol. 4, No. 7,
doi: /jfnr-4-7-9
© The Author(s) Published by Science and Education Publishing.