Monitoring content of cadmium, calcium, copper, iron, lead, magnesium and manganese in tea leaves by electrothermal and flame atomizer atomic absorption spectrometry.

Prki?, Ante; Juri?, Antonija; Giljanovi?, Josipa; Politeo, Nives; Sokol, Vesna; Bo�kovi?, Perica; Brklja?a, Mia; Stipi�i?, Angela; Fernandez, Carlos; Vuku�i?, Tina

Abstract

Due to the simplicity of tea preparation (pouring hot water onto different dried herbs) and its high popularity as a beverage, monitoring and developing a screening methodology for detecting the metal content is very important. The concentrations of Cd, Ca, Cu, Fe, Pb, Mg and Mn in 11 different samples of sage (Salvia officinalis L.), linden (Tilia L.) and chamomile (Matricaria chamomilla L.) purchased at local herbal pharmacy were determined using electrothermal atomizer atomic absorption spectrometry (ETAAS) and flame atomizer atomic absorption spectrometry (FAAS). The concentrations determined were: Cd (0.012 - 0.470 mg kg-1), Ca (5209 - 16340 mg kg-1), Cu (22.01 - 33.05 mg kg-1), Fe (114.2 - 440.3 mg kg-1), Pb (0.545 - 2.538 mg kg-1), Mg (2649 - 4325 mg kg-1) and Mn (34.00 - 189.6 mg kg-1). Principal Component Analysis (PCA) was applied to identify factors (soil and climate) influencing the content of the measured elements in herbal samples. The proposed methodology developed in this work was successfully applied to the detection of metals in herbal samples. The analysis showed that the content of toxic metals in herbal teas was below the maximum dose recommended by the World Health Organization (WHO).

Citation

PRKIC, A., JURIC, A., GILJANOVIC, J., POLITEO, N., SOKOL, V., BOSKOVIC, P., BRKLJACA, M., STIPISIC, A., FERNANDEZ, C. and VUKUSIC, T. 2017. Monitoring content of cadmium, calcium, copper, iron, lead, magnesium and manganese in tea leaves by electrothermal and flame atomizer atomic absorption spectrometry. Open chemistry [online], 15(1), pages 200-207. Available from: https://doi.org/10.1515/chem-2017-0023

• Journal Article Type: Article
• Acceptance Date: Jun 6, 2017
• Online Publication Date: Aug 16, 2017
• Publication Date: Aug 31, 2017
• Deposit Date: Dec 4, 2017
• Publicly Available Date: Aug 17, 2018
• Journal: Open chemistry
• Electronic ISSN: 2391-5420
• Publisher: De Gruyter
• Peer Reviewed: Peer Reviewed
• Volume: 15
• Issue: 1
• Pages: 200-207
• DOI: https://doi.org/10.1515/chem-2017-0023
• Keywords: Trace elements; Chemometrics; Tea; ETAAS; FAAS; PCA
• Public URL: http://hdl.handle.net/10059/2614
• Contract Date: Dec 4, 2017