http://dx.doi.org/10.4314/tjpr.v11i4.14
Abstract
Purpose: To determine the metallic content
of different parts of Gloriosa superba collected from
two different locations in Pakistan, and also to assess
their nutritious values and toxic levels.
Methods:
The plant material and soil were collected from two
different locations - polluted and unpolluted. Wet
digestion method was used for the preparation of samples
(whole plant and soil) followed by analysis using flame
atomic absorption spectrophotometer (for micronutrients)
and flame photometry (for macronutrients).
Results:
Of
the detected micronutrients,
high concentrations of Zn, Fe and Mn were noted for
samples collected from both areas. These values were
within permissible limits. Samples collected from the
polluted area contained Cu (7.5 – 13.0 ppm), Cr (1.4 −
1.9 ppm) and Ni (0.3 − 2.0 ppm), all of which exceeded
acceptable limits; the same nutrients were mostly within
acceptable limits for samples collected from the
unpolluted area. Significant presence of macronutrients
- Ca, Na and K - were observed in samples obtained from
both areas.
Conclusion: Proper validation of medicinal plants used for
therapeutic purposes should be mandatory on safety
grounds to protect consumers from contaminants.
Keywords: Gloriosa superba, Micronutrients,
Macronutrients, Toxicity, Metal ions, Medicinal plants