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© 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 9817.67 ±97.21c 9968.33 ±27.10d 9758.67 ±96.67c 13583.33 ±108.17i 12630.00 ±134.54h 10395.67 ±60.17e 11613.33 ±65.06g 9510.00 ±85.42b 10626.67 ±56.86f 8903.67 ±85.04a Ca 5405.67 ±22.50g 7012.33 ±32.81h 5465.00 ±25.24g 3916.00 +43.94e 1911.00 ±74.67a 4124.67 ±23.71f 3759.67 ±47.86d 2123.67 ±36.61b 2657.00 ±22.87c 3812.67 ±77.47d Mg 1662.67 ±36.30d 1965.33 ±23.44f 1648.67 ±22.72d 1693.00 ±26.41e 1519.3 3±20.21c 1432.67 ±23.03b 1439.67 ±28.75b 1191.33 ±70.81a 1413.00 ±19.92b 1554.33 ±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, 471-477. doi:10.12691/jfnr-4-7-9 © The Author(s) 2015. Published by Science and Education Publishing.