Transfer of some metals from medicinal plant used in phytotherapy, in different teas preparations

Abstract

The study aimed to determine copper, chromium, cadmium, nickel, lead, zinc and manganese in four species of medicinal plants, widely used in phytotherapy, as well as to evaluate their transfer rate in aqueous preparations such as infusion, decoction and cold maceration. The medicinal plants were purchased randomly from local producers, near the city of Otopeni and analyzed using atomic absorption spectrometry. The results show that, at least one metal exceeds the maximum allowed level (Cd-0.08 mg/kg and Cu-12.9 mg/kg in rosemary, Cr-3.1 mg/kg in thyme and Pb-3.6 mg/kg in basil), the transfer rate of them, being variable in aqueous extractive solutions. The highest transfer rate of metals was observed in the case of cold maceration, the order of recovery being Mn > Zn > Cu > Ni > Cr > Cd > Pb. Quality food control is strictly necessary, so that, by implementing stricter legislation/monitoring programs at national level, can reduce the risk of contamination with toxins that can affect the integrity of human health.

Keywords:

• Medicinal plants
• contaminants
• extractive solutions
• transfer rate %
• AAS

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This study was financed by the POS CCE 546/2013 – “Innovative solutions to determine the extent of contamination by toxic residues – heavy metals and pesticides – in products of plant origin”.