Podocarpus nagi is a tree belonging to the family of Podocarpaceae, which has ever been used for treatment of trauma, stop-bleeding, fractures, knife wounds, gunshot wounds, body odor, eye diseases, colds and rheumatoid arthritis in clinic. Some compounds have been isolated and their biological activities were also evaluated. it’s seeds contains much oil and which can be used for food after refining or directly used industrially. In this work, the trace elements in the nuts, nut shell and oil residue were detected by the method of atomic absorption spectrum, which can provide reference for the further study.
Podocarpus nagi, seeds, trace element, elemental analysis
Podocarpus nagi (Named Zhubai in Chinese) is a tree belonging to the family of Podocarpaceae, widely distributed in South District of the Yangtse River, such as Jiangxi, Zhejiang, Fujian, Hunan, Guangxi and Guangdong, etc. In Nanping, Sanming and Zhangzhou of Fujian Province, there are small scaled natural communities or artificial enclosure planting of the Podocarpus nagi, which is a native tree species of local place, which has ever been used for treatment of trauma, stop-bleeding, fractures, knife wounds, gunshot wounds, body odor, eye diseases, colds and rheumatoid arthritis in clinic. Some compounds have been isolated and their biological activities were also evaluated [1-5]. Its seeds contain much oil and which can be used for food after refining or directly used industrially [6]. The contents of Ca, Fe, Na, Mg, Mn, Zn, K, Cu, and heavy metal elements such as Cr in the nuts, nut shell and oil residue were detected by the method of atomic absorption spectrum in this work.
The experimental procedure listed below: the nuts, nut shell and oil residue were dried at 60oC and powdered respectively. Each sample was weighed the given weight and diluted in 50 mL volumetric flask using the deionized water after nitrolysis. The trace elements in the nuts, nut shell and oil residue were detected using the atomic absorption spectrum. The nitrolysis processes (Figure 1) and articles results are listed in table 1, which provide the evidence for the further research.
Table 1. The content of the trace elements.
Elements |
Stand curve |
R2 |
The content of the trace elements (mg/g) |
nut shell |
nuts |
oil residue |
Na |
Y=0.4876X-0.0168 |
0.9990 |
0.088 |
0.064 |
0.092 |
Mg |
Y=0.9391X+0.1272 |
0.9989 |
0.315 |
0.0418 |
0.0813 |
K |
Y=0.1452X+0.7814 |
0.9998 |
0.558 |
0.769 |
0.797 |
Ca |
Y=0.0393X+0.0269 |
0.9996 |
0.324 |
1.310 |
0.526 |
Mn |
Y=0.5738X+0.0695 |
0.9989 |
0.021 |
0.028 |
0.126 |
Zn |
Y=0.4649X+0.0359 |
0.9994 |
0.006 |
0.042 |
0.036 |
Fe |
Y=0.1117X+0.0071 |
0.9996 |
0.060 |
0.039 |
0.032 |
Cu |
Y=0.1575X+0.0009 |
0.9997 |
0.008 |
0.018 |
0.021 |
Cr |
Y=0.0213X+0.0009 |
0.9989 |
0.038 |
0.026 |
0.015 |
Figure 1. Processes of nitrolysis and detect the trace elements.
This work was financially supported by the National Natural Science Foundation of China (21875252) and the Project of The Plan of Xiamen Science and Technology (3502ZCQ20171000).
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